2
votes
1answer
189 views

postfix change to address based on sending host

We have one central postfix mailserver and some more application servers behind whereas those servers relaying the mails trough the central mailserver. now i want to configure the central one to ...
1
vote
1answer
427 views

Postfix rewrite sender: why doesn't this work

I have server A with an IP address only and a dummy FQDN (on the basis all machines should have a FQDN): pants.net.invalid. All mail is relayed through another server elsewhere, which works fine. ...
1
vote
0answers
710 views

Rewriting sender address based on the recipient

I'm trying to set up my postfix server to alter the sender address of outgoing e-mails for one specific recipient domain (example.com) -- otherwise I'd just configure smtp_generic_maps in main.cf and ...
2
votes
2answers
2k views

Forward Mails to Gmail

I have a postfix mailserver running. Mails sent from users to Gmail are showing up in Gmail, so it works in general. Same for all other freemail hosts I know. The problem is that some users have no ...
0
votes
3answers
366 views

Is there a way to set up an SMTP relay that allows users of a web app to have the web app send emails with their own email address as senders?

the web service sends out emails on behalf of the users to their customers. So john@domainA.com uses webservice and webservice sends emails . The emails should be appearing as coming from ...
7
votes
3answers
5k views

SRS / Sender Rewriting when forwarding mail through postfix

Is there any way to perform SRS, or something similar using Postfix? When I get a mail from user@example.org, I forward it (via a catchall) to something@gmail.com, but GMail is checking SPF, and ...