We've got our e-mail hosted by Amazon WorkMail, and have configured the MAIL-FROM for our domain.
We have a particular use case for a 3rd party which is certifying e-mails for particular purposes. In order to authenticate the sender, this 3rd party uses the "Return-Path" header, which needs to match the "Mail-From" header. But the "Return-Path" will use the configured MAIL-FROM (which is a subdomain of our main domain) and a random username.
From: user@domain.com
Return-Path: 010203925faf32ae-95c44234-8042-4d27-94c0-9d44d3702d30-000000@mail.domain.com
Is there any way that WorkMail can be set up, so that the Return-Path will be the same as the From header?
Thanks in advanced for your help!
