Forward = Spoofing?

[aseques]

HSorgYves Wrote:Both domains are on the same server and configured the same way. That is certainly not the difference!

Yup, no problem there

HSorgYves Wrote:So you think it comes from the fact that the list server sends another "mail from"? How can it afterwards set the "mail from" to the original one then?

If you receive a mail in your server from that mailing lis, and you look in the logs, you'll see the sender of the message that is using the mailing list server (basically search for the ESMTP id)

If you want to change that, it means that you have to rewrite the message headers as if the mail was generated from your domain, giving a real return path (in case the destination server needs to verify anything or giving a bounce), that's what the mailing lists are doing.