Tools to monitor your Sending Reputation

The Email Deliverability and Privacy Team always stresses the importance of a strong sending reputation. By keeping an eye on your engagement (opens, clicks, etc.) and reputation (spam complaints, spam traps, unknown users, etc.) metrics you’ll get a good picture of how your emails are being received by subscribers.

But if you’re looking for another measure of your reputation you can take advantage of a handful of resources that will let you know where you stand.  Here are 4 sites that will help you check sending reputation:​

Like a credit score, a Sender Score is a measure of your reputation. Scores are calculated from 0 to 100. The higher your score, the better your reputation and the higher your email deliverability rate. Numbers are calculated on a rolling 30-day average and illustrate where your IP address ranks against other IP addresses. This service is provided by Return Path and provides reputation from primarily a B2C perspective.

Senderbase, newly rebranded as Talos Intelligence, is a product of Cisco and provides you with the tools to check your reputation by ranking you as Good, Neutral, or Poor. Good means there is little or no threat activity. Neutral means your IP address or domain is within acceptable parameters, but may still be filtered or blocked. Poor means there is a problematic level of threat activity and you are likely to be filtered or blocked.



WatchGuard’s ReputationAuthority helps protect business and government organizations from unwanted email and web traffic that contain spam, malware, spyware, malicious code, and phishing attacks. You can look up your IP address or domain, receive a reputation score from 0-100, and get the percentage of emails that were good versus bad.


Google Postmaster Tools

Google's Postmaster Tools can help you understand your domain's reputation when sending mail to Google domains, both Gmail and Google Apps.  More information on how to set this up can be found here Set Up Google's Postmaster Tools



Smart Network Data Service (SNDS) can give a sender data about the traffic seen originating from the IPs they are mailing from, such as mail volume and complaint rates.  Because Marketo would need to grant specific senders access to view SNDS data for the IPs they mail from, this is only eligible to customers sending from dedicated IPs.  More information on how to set this up can be found here Microsoft SNDS Instructions .


Is this article helpful ?


Not applicable

Is there a way to tell which of these scores applies to your Marketo emails? I'm seeing a number of different IPs on both and ReputationAuthority, some of which look like Outlook servers and a few that I don't recognize. Some of them have better scores than others, so I'd be interested to see where our bulk emails stand.


Level 4

Thanks - very helpful info!

Level 2

Same question here

Level 7

Zoe & Raj,

Marketo sends from four different datacenters and there are different IPs used in those datacenters. It also depends if you are sending from Marketo's shared or dedicated IPs.  You are also to see the IP/s you are sending from by looking at the email headers of an email you've sent from Marketo.  Google has a pretty good tool to help explain how to find and read an email's header.

Trace an email with its full headers - Gmail Help

You can also reach out to Marketo's Support Team and they can help identify the IP/s your subscription is sending from.


Level 3

Love this! Thank you for sharing.