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(Article Updated - August 2024) Overview A blocklist is a database of IP addresses or domains that have been associated with the sending of unsolicited commercial email or spam. Internet Service Providers (ISPs) and business email networks use information from blocklists to filter out unwanted email. As a result there can be a drop to inbox delivery rates if the IPs or domains involved with sending email are listed on a blocklist. Marketo’s Email Delivery and Compliance team monitors blocklist activity on our IPs and domains daily. When an impactful listing occurs, we reach out to the blocklist, attempt to identify the sender that triggered it, and work with the blocklist organization to get the listing resolved. There are thousands of blocklists, most will not have a significant impact on your delivery rates. Below, we have compiled a list of the blocklists that commonly appear across our sender ecosystem. Each blocklist has been grouped into a top tier (Tier I) by most impactful, to the bottom least impactful tier (Tier III). These may have little to no impact across our sender network. Tier I Blocklist Spamhaus (SBL) Impact: Spamhaus is the only blocklist that we categorize as a Tier I for a reason: it has by far the greatest impact on delivery. It is the most well-respected and widely used blocklist in the world. A listing at Spamhaus will have a negative effect on your ability to deliver emails to your customer’s inbox and can cause bounce rates of over 50%. Evidence suggests that most of the top North American ISPs use Spamhaus to inform blocking decisions. How it works: Unlike many blocklists, Spamhaus lists senders manually. This means they are proactively watching sender activity, collecting data, and base listings on a number of variables. Most commonly senders are listed for mailing to spam trap addresses that Spamhaus owns. Sometimes Spamhaus will list senders based on recipient feedback as well. Next Steps: Please note that every Spamhaus email can be quite different depending on the information provided and the nature of the listing . Because Spamhaus has multiple types of listings, the remediation steps are based on which type of blocklisting has occurred. We have listed the most common types to affect Marketo customers, from most to least impactful. Impact can range from a full block of top severity, to a partial block that is less severe (CSS Data, DBL). If remediation isn’t performed and the problem not addressed, these listings can increase in severity and turn into a full blocklisting. Spamhaus Blocklistings Types SBL (full blocklisting) Considered the most impactful. Remediation steps: Our team monitors closely for Spamhaus listings. Once alerted to the listing, we send an email notifying the customer, and reach out to the Spamhaus contact to start the remediation process. Only a Marketo delivery team member should be in direct correspondence with the Spamhaus contact, to speak on behalf of the customer, and to relay their questions and instructions, ensuring quick resolution and reduced impact. Senders that trigger this listing on a shared IP range will be moved to a more isolated, penalty range (IPB), so as not to impact the other shared senders. Those affected on a Dedicated IP, only impact their own sending and will not be moved. However, depending on the severity of the issue, our team may need to revoke a customer’s ability to send any emails until full resolution. The listing will last until Spamhaus is satisfied that the offending sender has taken the appropriate steps to mitigate the problem. SBL CSS Customers are alerted of the listing with an email containing all the information needed to immediately begin the remediation process. This is part of an automated trigger listing, that allows for a customer to delist directly on the Spamhaus website, after they’ve completed remediation. Remediation steps: Customers will go to the Spamhaus IP lookup website, at https://check.spamhaus.org, where they can check on the status of their IP and continue to monitor it in real time, until it is no longer listed there. Follow the remediation and delisting instructions provided, and check for specific details in the blocklist notification email. DBL (Domain blocklisting) Customers will receive an email notification alerting of the company domain being listed. The email will contain specific information to help narrow down and identify which email source likely triggered it within Marketo. It’s important to note that any email sent from outside of Marketo, that contained the company domain, is suspect. This means, if the sender uses multiple IPs and/multiple email platforms, then any of those could be the source. Remediation steps: Follow the detailed instructions in the email, which will also provide a link to the Spamhaus Domain reputation checker webpage, to check the real time listing status of the affected domain. Once the email source is identified and cause addressed, this customer will follow the online instructions to request to be delisted. Tier II Blocklist SpamCop Impact: SpamCop is not used by any of the major North American ISPs to inform blocking decisions, but it makes it to the Tier II list because it can have a significant impact on B2B email campaigns. SpamCop is considered a Tier I one blocklist for B2B marketers but a Tier II for B2C marketers. SpamCop is a dynamic IP blocklist, that can affect a single IP or a subset of IPs Typically, the block will automatically lift within one business day, but can take longer for relisted IPs. To have triggered a SpamCop listing likely means the sender has a list management problem that should be addressed. How it works: SpamCop lists IPs for one of two reasons: Either the email hit SpamCop spam trap addresses OR A SpamCop user has reported the email unwanted. Most of SpamCop’s spam traps are previously valid addresses that have not been active for 12 months or longer. Remediation steps: If you are seeing a significant number of bouncing emails caused by a SpamCop blocked IP but aren’t sure if your email activity triggered the listing, first identify whether you are sending on a shared sender network or not. If sending from a shared IP range when this occurs, you or any other customer sending from the same network may have contributed to the IP block. This IP block will automatically get dropped within a business day. For those on a Dedicated IP that trigger a listing, refer to the above remediation steps and resources, to address the list management issue. Tier III Blocklist (Low/ No impact ) These are considered the lowest tier and therefore cause the least impact across the Marketo sender ecosystem. Some of these blocklists were more impactful at one time, while others are only impactful based on the sender region (Manitu). Others still can suddenly flare up (Lashback). There are also many blocklists that are ignored (0spam), and are not taken seriously because they do not provide any means to delist once on the list (NoSolicitado) or that they charge money to have the listing removed ( UCEPROTECT ). The pay-to-delist model is not well respected in the email industry. When using blocklist tool checkers, such as MXToolBox, many blocklists will appear, but very few are relevant. Here is our selection of Blocklists you may come across that are least impactful: Project Honey Pot SpamAssassin URIBL/SURBL DrMX PSBL 0spam HostKarma Ascams ZapBL Barracuda Trendmicro Inc. Cloudmark Proofpoint Invaluement ISP Blocklists Some ISPs use internal blocklists to make blocking decisions. Examples include AOL, Yahoo, Gmail, Outlook and Hotmail. If your IP is being blocked by one of these networks, and those networks have a large presence in your lists, a block of this kind could have a noticeable negative impact on delivery. Marketo monitors for significant ISP blocks. Those experiencing deliverability issues with emails not making it to the Inbox and bulking in the spam folder may benefit from additional services with our Email Delivery Consultants. Remediation Steps: Email Delivery Compliance Team works to resolve any ISP blocks. ISP blocks are are usually resolved or lifted within less than 24 hours of a delisting request. Customers experiencing significant blocks for Microsoft domains (outlook.com, live.com, microsoft.com), can submit a request to the delivery team to seek mitigation on their behalf. Additional Resources: Blocklist Deep Dive Abuse Report Deep Dive What is a spamtrap, or spam trap, and why does it matter? Blocklist remediation Blocklist resolution flowchart Successful lead reconfirmation What is a blocklist?

Issue You want to set up a DKIM key on one of your domains or subdomains, but another service has a DKIM key already set up on the selector/domain combo. Solution Beginning October 2023, Marketo has upgraded it's DKIM feature to allow for a Custom Selector for DKIM Keys. Most Users will be able to utilize the prior default selector, m1, as their DKIM Key. However, if another integration is already utilizing the m1 selector, a custom value can be used. Common ones seen are "m2", "a1", "mkto", etc. It can be longer, but shorter is generally better Afterwards, you'll be able to validate DKIM as detailed in documentation: docs.marketo.com/display/public/DOCS/Set+up+a+Custom+DKIM+Signature

From the Marketo Email Use Policy: "...You may not send any Unsolicited Email by use or means of the Marketo Service. "Unsolicited Email" is defined as email sent to persons other than: persons with whom you have an existing business relationship, OR (ii) persons who have consented to the receipt of such email, including publishing or providing their email address in a manner from which consent to receive email of the type transmitted may be reasonably implied." The full text of the policy is here: documents.marketo.com/legal/use-policy/ An abuse report is a report that an individual sends to abuse@marketo.com alleging that a Marketo customer sent unsolicited email. There are a number of reasons why someone might report abuse. Here are a few common reasons people report abuse to us: The person forgot they opted-in to the mailing The person received genuinely unsolicited email The person opted in, but the branding in the email was different than the branding on the opt in form so it was not clear the email they received was connected to their opt-in experience Someone signed up for your list with the wrong address, and the person who actually received your email felt it was abusive For additional reference - Abuse Report Deep Dive

The Charter of Fundamental Rights of the European Union recognizes in Article 8 the right to the protection of personal data. This fundamental right is developed by the European legal framework on the protection of personal data consisting mainly of the Data Protection Directive and the ePrivacy Directive. They lay down several substantive provisions imposing obligations on the data controller and recognizing rights to the data subject, prescribing sanctions and appropriate remedies in cases of breach, and establishing enforcement mechanisms to make them effective. Although strictly speaking it is data controllers who bear legal responsibility for complying with data protection rules, also those who design technical specifications and those who actually build or implement applications or operating systems bear some responsibility for the data protection aspects from a societal and ethical point of view. The law applies to all Member States of the European Union. However, even websites outside the EU are required to comply with the law if they are targeting Member States. For example, a site based in the USA that sells products to consumers in the UK, or that has a French-language version of its site aimed at users in France, will still have to comply. Anonymous cookies, those that do not contain information that would enable you to identify a user, do not infringe the law anonymity and therefore are not a problem. The directive’s core requirement is to define how consumer’s "opt-in" or "opt-out" to cookies, and what level of information the consumer must be provided when cookies are used so they are sufficiently informed. Support Browser Do Not Track Settings docs.marketo.com/pages/viewpage.action?pageId=2951124 Visits to web pages do not reflect actual activity https://nation.marketo.com/docs/DOC-1300

Summary You have set up a campaign or campaigns in the Email Deliverability Tool (250ok), but there is no engagement metric showing Total opens and Unique opens, which should be available in the ‘Engagement Overview’ in the Email Deliverability tool. You would need to ensure that you have configured the necessary setup for the tracking to work in the Email Deliverability tool. Issue Campaigns created in the Email Deliverability tool (250ok) doesn’t show any engagement overview metric such as total opens and unique opens. Environment Email Deliverability tool (Production/Sandbox) Solution You would need to implement the necessary setup for the metric to show in the Engagement Overview in the Email Deliverability tool (250ok) Follow the steps below to ensure you have configured the setup for campaign tracking. 1. Ensure your DNS CNAME is configured. (All that is required is creating a CNAME DNS entry on this domain that points to 250analytics.com) For more information, you can refer to this external documentation: https://www.validity.com/knowledge-base/what-are-custom-domains-in-250ok-analytics/ 2. Insert the correct tracking pixel code retrieved from the Email Deliverability tool. 3. Always utilizing the ‘c=‘ tag in your tracking code for your campaigns to ensure the tracking is measured correctly in the Email Deliverability tool. (Obviously, the CNAME above is essential to have it set up correctly). You can follow a guide on how to implement the ‘c=‘ tag and retrieve the tracking pixel is here: help.returnpath.com/hc/en-us/articles/360046308092-How-Do-I-Add-My-250ok-Tracking-Pixel- Once you have all these configuration settings, you can start tracking your campaigns which are sent via Marketo in the Email Deliverability > Engagement Overview. Root Cause Mis-configuration or no configuration made causing the campaign tracking does not work.

What is a Blocklist? Can I Still Send My Emails, or Are You Blocking Me from Sending? What Is a Spamtrap and Why Do They Matter? Can You Give Me the Spam Trap Address That Triggered the Blocklist So I Can Remove It from My Database? Can You Give Me More Information regarding the Blocklist Issue? What Is the Quarantined IP Range? I Sent This Email Campaign a While Ago. Why Am I Only Getting Notification of the Blocklist Issue Now, and Am I Still Blocklisted? The Blocklist Notification Went to the Wrong Email Address. Why Was It Sent to That Address? Which blocklists should I be concerned about? - Top Blocklists – What You Need to Know How do blocklist issues get resolved? What steps do I need to take to resolve the blocklist issue? - Blocklist Remediation

When a customer triggers a blocklisting on Marketo's shared IP range that customer is moved to a set of IPs we call the quarantined IP range. We do this to protect the health of our shared network and ensure the best deliverability possible for all of our customers on that network. If you have received a Blocklist Notification from Marketo reporting that you have triggered a blocklisting your Marketo account is now in the quarantined IP range. While you are in the quarantined range it is possible that you may experience a slight decrease in your deliverability rates. The reason for this is that you are now sending from a range made up of senders that have also caused other blocklist issues. All customers have received a notice of the listing and are in the process of repairing their database. There are two ways to be removed from the quarantined IP range: Follow the steps outlined in our Blocklist Remediation article. Be sure to fill out the form referenced in the email alert to indicate that you have taken steps to mitigate the issue. Demonstrate clean sending behavior for 3 months. We remove senders from the quarantined IP range if they have not triggered any new listings in 3 months. To ensure your best deliverability rates blocklist issues should be addressed right away to prevent further damage to your sending reputation. Furthermore, if no action is taken to improve list hygiene the issue will likely recur. Marketo's Delivery and Compliance Team strongly recommend following the Blocklist Remediation steps. Additional Resources: Blocklist Deep Dive

*Updated in September 2024 Leads can be auto unsubscribed due to default Feedback Loop setup with the ISPs listed on this page. You can use the following filters to find leads that have clicked the SPAM button in your emails: Filter 1: Data Value Changed Attribute: Unsubscribe New Value: True Reason: Contains, complaint (Optional to Specify what Email Domain) Filter 2: Email Address Email Address: Contains, @domain.

*Updated in September 2024 Quick points: Spamtraps are addresses owned by antispam organizations Emailing a spamtrap can result in your sending domain or IP to be blocklisted Maintain current, direct opt-in with an active lead database to avoid this Spamtraps are usually functional email addresses that can successfully receive a message. What is a spam trap or spamtrap? A spam trap, or spamtrap is an email address secretly owned by an antispam organization that is used to detect spam. Antispam organizations do not sign up for mailing lists, so they consider any email sent to these addresses to be spam. Once an email is sent to the spamtrap, the antispam organization that owns this address can/will blocklist the IP and/or domain that sent the email. Email administrators purchase subscriptions to the data offered by blocklist providers and may use the lists to block all incoming email from listed IPs or containing listed domains. From the marketer’s perspective, this can mean a high number of bounced emails leading to low lead engagement, and ultimately to weak revenue performance. There are three types of spamtraps – pristine traps, typo, and repurposed/recycled traps. A pristine trap is an email address that was never used by a person. A repurposed trap is an email address that once belonged to someone but is no longer a valid address; these addresses will bounce as bad addresses for at least six months before an antispam organization will turn them into live traps. A typo trap will contain a misspelled domain. How can a spamtrap get into my Marketo lead database? Purchased data Purchased data is unreliable and is high risk for your brand’s sender reputation. The antispam community does not like the use of purchased data, so antispam administrators have made a concerted effort to get spamtrap addresses into the databases of data vendors. While data vendors may claim they provide opt-in data, you risk inadvertently purchasing spam trap addresses when using a data vendor. A foundational strategy to maintaining healthy sender reputation is to gather email addresses directly from individuals alongside their consent to be enrolled in bulk email communication. Sending unsolicited email is prohibited by the Adobe’s Acceptable Use Policy because this practice has a high risk of causing deliverability problems for your brand and the Adobe network. To avoid spam traps, get direct opt-in before sending email. If you have purchased data in the past, we recommend setting any inactive purchased leads to marketing suspended or simply removing them from your database. Old data Repurposed traps are email addresses that were once valid but are now owned by an antispam organization. This can happen when a company goes out of business; expired domains are often purchased by antispam organizations. Sometimes a company that has a direct partnership with an antispam organization will allow email addresses of former employees or users to become spamtraps. Because antispam organizations will generally make sure future spam traps return a bounce as bad addresses for at least six months before they become spam traps you can prevent repurposed traps in your database by emailing remaining engaged with everyone in your database at least once every six months. To safeguard your sender reputation, avoid reengagement campaigns to addresses you have not contacted in more than six months. Unconfirmed form entries People can unintentionally enter spamtrap addresses into forms either by mistyping their email or by intentionally using a fake email address that happens to be a spamtrap. If you use single opt-in, you risk adding spamtraps to your mailing list. This is more likely to happen if you are a B2C company or through the offer of gated content that requires an email address. How can I identify spamtrap addresses? Spamtrap addresses are considered trade secrets by the antispam organizations, and they are obscured by design. They do not share these addresses because their goal is for senders to change their mailing practices rather than to simply remove spamtraps from their mailing lists. That said, one thing we do know about spamtraps is that they tend to be automated processes and do not engage. Spamtraps do not click links. You can use smart list filters to identify inactive leads in Marketo. How can I prevent spamtraps in my database? Maintain active, direct opt-in for all leads Don’t purchase data Email engaged contacts least once every six months Don’t add old data directly to your mailing list Suppress perpetually disengaged contacts Grant access to assets such as free trials and whitepapers as email links to discourage intentional use of fake email addresses on forms Use scripting on your forms to identify potential typos

We manage our network to provide our customers with the highest server availability and best deliverability possible. Marketo Engage has a strong anti-spam policy and a team that handles blocklist notifications in our IP space and spam complaints. We also cooperate with most major anti-spam providers and ISPs. In addition, we maintain feedback loops (FBL) for many of the most popular email providers. For more information on FBLs and ISPs with whom we have this arrangement, click here. Blocklistings are usually caused by sending mail to a spam trap email address. For an explanation on what causes blocklisting, click here. When we receive notification of a blocklisting, we react in two ways. First, we go through the procedures to remove the listing from that blocklist as soon as possible. Second, we determine (if possible) which of our customers caused the blocklisting and work with them to improve their mailing lists to prevent a reoccurrence in the future. This is usually a cooperative process, most frequently, a review of mailing policies and strategic pruning of a customer’s lead database will return them to best practices. Blocklists: Frequently Asked Questions Is this article helpful ? YesNo

If you have submitted a support case and you feel that the case was improperly handled or that the solution being offered does not meet the communicated Marketo support expectations, then we would welcome the opportunity to look deeper at your specific support engagement and work with you on delivering a better resolution. Caution: If the item you're looking to escalate is related to a Production Down incident, please call the support line for your region to receive immediate assistance. Support Manager escalations are only handled during normal business hours. The phone numbers for each region are listed below, follow the prompts for P1: Americas: +1.877.270.6586, Direct: +1.650.376.2303 Europe, Middle East, & Africa: +353 (0)1 242 3030, UK: 0800 151 3030 Asia Pacific: +61 2 8031 8188 Japan: +81.03.4233.9014 How to Escalate: Step 1. Navigate to the "Case Management" area of the support portal either by mousing over the Support tab and selecting "Case Management" or clicking the Support tab and click on the “My Case Management” button. NOTE: You will need an open or recently closed case in order to escalate to support leadership. This is a article attached image Step 2. From here you will need to click on either an open or a recently closed* case: This is a article attached image *Support Cases that have been closed for longer than 10 days are no longer eligible to be re-opened and we ask that you open a new support ticket for your current issue prior to escalating to a Support Manager. We ask that you have an open support ticket for a Support Manager to be able to address specific issues. Step 3. After selecting a case, click on the Escalate to Manager button: This is a article attached image Step 4. A pop up will display and you will need to the purpose for the escalation and click on the “Escalate” button. This is a article attached image Once your support escalation case has been submitted a Marketo Support Leader will contact you within 1 business day of your support region's support hours to address the issue.

An email being filtered to a quarantine or bulk mail folder happens after the recipient mail server has accepted message. Once an email has been accepted by a mail server, it is impossible to tell where it went or what happened to it. Note that this is true of any mail sent by any system on the Internet. Every mail server has configurable filters that determine how received mail will be handled. The mail server administrator should be able to adjust those filters to ensure delivery of emails based on their business standards, or there may even be end-user-configurable controls that can accomplish the same thing. If test mailings you are sending to yourself or your colleagues are being filtered to a quarantine or bulk mail folder, you should consider asking your email administrator to whitelist Marketo’s IP ranges. They can be found here. You can also improve your deliverability in general by setting up SPF and DKIM records, and branding your tracking links.

Any emails being sent as part of 'Forward to Friend' will create that user as a new lead (provided that the lead does not already exist in Marketo). When leads are created in Marketo via the 'Forward to Friend' feature, Marketo automatically unsubscribes the lead records in order to protect our global customers from anti-spam laws. This is because a lead being sent a forwarded email doesn't qualify as opting in to a mailing list and also prevents them from getting any other emails by accident.

Issue How to re-subscribe records who are already unsubscribed. Solution Once the person is willing to resubscribe to receive your emails, either of the following can be done: Smart Campaign: Change Data Value of "unsubscribed" to false.You can either use a Smart Campaign to execute this flow or can just go with single flow action ( select the lead, Person actions > Marketing > Change Data value; Attribute: Unsubscribed, New Value: False.) You can manually change unsubscribe from True to False. To do this, go to Lead database, click on the lead ( whom you need to unsubscribe), go to lead Info tab, look for unsubscribe field , remove the tick or check off the unsubscribe field checkbox.

Issue You see that a lead has an unusually high amount of Clicked Link activity for a particular email after delivery. Solution There can be a couple reasons for this. If you see that all links in the email are being clicked immediately upon delivery, it is likely that the lead's email security software is link-testing to guard against phishing or malicious links. However, if you see an unusually large number of link clicks over the course of a day or two, it may be that the lead forwarded the email to other people who clicked on the links. Since the tracking links are specific to the lead who was sent the original email, if the email is forwarded to other people, their clicks will be recorded under the initial lead's activity history. Marketo does not have a way to confirm this is the case, but if you open the Click Link activities in the leads Activity Log and look at the details, you may see the User Agent (which indicates the operating system and client software used to display the email) is different for each click. If you see a variety of different user agents in the details, it is likely the email is being opened and clicked by different people who were forwarded the email.

Double opt-in is the gold standard of email permission. Also known as confirmed opt-in or COI, this practice is where a person fills out an opt-in form and is then sent an email and must click a confirmation message before they are added to the mailing list. Here are some great reasons to use double opt-in: Protects against typos and bots Protects against spamtraps Reduces bounce rates, improves deliverability Required in some regions Increases engagement rates If you'd like to set up double opt-in with Marketo you can do this with the use of the Marketing Suspended function. Marketing Suspended is a status that is functionally equivalent to Unsubscribe - Marketo will not send these leads marketing emails, but will send them operational emails. You'll need an opt-in form and a pair of trigger campaigns. First, set up a trigger campaign such that, when the form is filled out, the flow has a Change Data Value to mark the lead as Marketing Suspended, and then a Send Email step to send an operational email that you will use to confirm their request to join your mailing list. Your confirmation email should be short and to the point, and make sure to set it as an operational email. We recommend that it is clearly branded, use a simple subject line such as "Confirm Your Request to Join Our Mailing List" or similar, and include a link within to a simple confirmation landing page. Set a second trigger campaign such that whenever someone clicks the confirmation link to the confirmation landing page, the flow will change data value Marketing Suspended new value is false. A follow up flow should be set up that if the recipient doesn't activate the link in the confirmation email the address is either deleted or set to Blacklist within the database after a reasonable timeframe, usually 2 weeks. The Blacklist status will ensure that no email is set to that lead until they have completed the subscription process. This prevents future operational emails from being sent to this email address unintentionally. That's it! Now, when someone fills out your opt-in form, they will be set to Marketing Suspended until they click the confirmation link in your operational confirmation email. You'll be well on your way to increasing the quality of leads on your mailing list by implementing this simple process.

Issue You receive a DMARC report from an ISP saying that your email failed to pass the SPF alignment check, but when you check your SPF listing in Admin > Email > SPF/DKIM, SPF is verified. Solution The SPF record in Admin > Email > SPF/DKIM is tied to your FROM domain. DMARC alignment (using SPF) aligns the domain in the FROM address with the domain in the “return-path” address. This “return-path” address, usually using a '*.mktomail.com' domain, is generally unseen by recipients and directs email bounces and errors back to Marketo for processing. Failed DMARC alignment, between these two domains, is what is triggering the failure your DMARC reporting. DMARC compliance requires EITHER DKIM or SPF compliance, not both in most cases. This article reviews the two methods available for DMARC alignment - https://nation.marketo.com/docs/DOC-1202-technical-tip-set-up-dmarc-verified-domains-in-a-few-easy-steps Having DKIM DMARC alignment may be enough and you may not need to rely on full SPF DMARC alignment. In order to set up SPF DMARC alignment, Branded Return-Path will allow you to align the “return-path” domain with your sending FROM address domain. If you have a dedicated IP on the current pricing plan or are on the Trusted IP range, Marketo can brand your return path at no additional charge. If you have a legacy Silver Dedicated IP package, or are on the Shared IP range, you can purchase the Branded Return Path as an add-on. More technical info can be found here: What is DMARC? - https://nation.marketo.com/docs/DOC-1097 https://nation.marketo.com/docs/DOC-5910-branded-envelopefrom-on-shared-or-trusted-ips https://nation.marketo.com/docs/DOC-5951-branded-envelopefrom-on-dedicated-ips

Issue You want to recall emails sent from your Marketo instance. Solution Once an email has been sent from Marketo Servers it cannot be recalled or pulled back. You can cancel a program before it sends at its scheduled time using the steps here: https://docs.marketo.com/display/public/DOCS/Abort+Email+Program The above cancellation only works on Email Programs. If you are wanting to cancel a smart campaign follow these instructions: https://docs.marketo.com/display/public/DOCS/Abort+a+Smart+Campaign Note: A smart campaign will only stop what hasn't been run yet. If you already had 100 emails sent by the time you cancel it, those 100 emails cannot be unsent. You may see in your Outlook an option for "Recall Email." This function within Outlook only works with internal sends/private systems where the client can request the server revoke access to other client mailboxes before they're viewed, such as your office email to other users in the same company.

Knowledgebase

Maintaining a Directory of Leads Bouncing Emails

Top Blocklists - What You Need to Know

Custom DKIM Selector

Why do people report abuse?

Marketing Automation and the European Privacy Laws

Email Deliverability Tool - Campaigns Not Being Tracked

Blocklists: Frequently Asked Questions

What Is the Quarantined IP Range?

Finding Leads that are Auto Unsubscribed for Email Spam Complaints / Feedback Loop (FBL)

What is a spam trap and why do they matter?

550 Rejected by Header Based Anti-spoofing Policy

Which blocklists should I be concerned about?

How does Marketo respond to blocklisting and spam notifications?

Escalating a Support Issue

How Can I Tell If My Email Is Getting Filtered into a Quarantine or Bulk Mail Folder?

Email With Email CC Isn't Sending to Some CC Recipients

Unsubscribed Occurs When ‘Forward to Friend’ Email Is Received

How to Re-subscribe a Lead

Lead Record Shows an Unusually Large Number of Link Clicks for an Email

How to Set Up Double Opt-In (COI)

DMARC Report Says an Email Fails SPF but the SPF Record Shows as Verified.

Can an Email Be Recalled?