Issue
Customers on Shared or Trusted IPs are able to set up additional branding within the Marketo sending infrastructure. You are able to set up a branded 'envelope_from' so the From Domain used by the Marketo sending servers is associated with your brand instead of with Marketo.
This enables you to further isolate your sending reputation to your own brand and email activity. This can improve delivery rates to email networks looking for this level of alignment (generally smaller B2B domains but this can also help with AOL and Gmail). Branded 'envelope_from' is also key for authentication using DMARC, as it will allow you to align the domains in your email headers.
Solution
Issue Resolution
Marketo's default envelope_from (also known as return-path) domains include:
San Jose datacenter - @em-sj-77.mktomail.com
London datacenter - @eu-lon-188.mktomail.com
Ashburn datacenter - @potomac1050.mktomail.com
Sydney datacenter - @snsmtp.mktomail.com
Process:
To implement this, first reach out to your CSM to confirm that branded return path addresses are included in your Marketo package. Branded return path for instances on a Shared IP would be a paid addition to your Marketo Subscription. There is no charge for instances on the Trusted IP range. Then you will need to chose a sub-domain of your choice for this branding, and set up 2 DNS entries depending on which datacenter your Marketo instance is on:
-If your Marketo instance is on the shared range in San Jose, the configs would be:
IN MX (your subdomain): em-sj-77.mktomail.com
IN TXT (your subdomain) “v=spf1 include:mktomail.com -all”
-If your Marketo instance is on the shared range in Ashburn, the configs would be:
IN MX (your subdomain): potomac1050.mktomail.com
IN TXT (your subdomain) “v=spf1 include:mktomail.com -all”
-If your Marketo instance is on the shared range in London, the configs would be:
IN MX (your subdomain): eu-lon-188.mktomail.com
IN TXT (your subdomain) “v=spf1 include:mktomail.com -all”
-If your Marketo instance is on the shared range in Sydney, the configs would be:
IN MX (your subdomain): snsmtp.mktomail.com
IN TXT (your subdomain) “v=spf1 include:mktomail.com -all”
Once that DNS setup is completed, submit a case to Marketo Support with those details and we can complete the process by implementing that branding for your instance's emails.
.png)