First off, really enjoying the mailcow project!
I am running into the following problem:
Microsoft keeps blocking my dedicated ip because the volume to their email servers is too low.
To remedy this, i made transport maps to relay all email to microsoft services (hotmail.com, live.com ect) though mailgun with user account email@example.com.
This works like a charm untill i add another domain2.com and dmarc rears it’s ugly head.
Because all email (to microsoft) is send through domain1.com dmarc fails for domain2.com (DKIM is not valid).
- is there a way to set up sender dependant transport maps?
- is there a way to set up Sender-dependent transports to only transport email to microsoft services?
- Is there another smtp service that can handle multiple domains with a single smtp account?
Any help or tips to circumvent the microsoft ip bans are also welcome.