Change mail recipient domain on Postfix

gproietti@gmail.com · 11-04-2017, 05:07 AM

Hi,

Recently I changed my FQDN for mail server to a new domain, keeping also possibility to receive email in the old domain.

So, we moved from user@domain1.com to user@domain2.com .
All is working well but I would like to remap incoming mail addresses from @domain1.com to @domain2.com.

I.e. if someone from external sends an email to goofy@domain1.com , I want the user goofy to receive it as addressed to goofy@domain2.com in the TO field.

I tryed to apply a configuration found in this tread :

https://www.linuxquestions.org/quest...n-name-596767/

but it only partially works, as in the received email I find that :

Quote:

X-Original-To: goofy@domain1.com
Delivered-To: goofy@domain2.com
Subject: prova di nuovo
To: goofy@domain1.com

So as the To field is left unchanged the mail client (we use Horde) still showing the old recipient's domain as destination.

My environment is:

Postfix : mail_version = 2.6.6
OS: CentOS 2.6.32-573.22.1.el6.x86_64

Thanks in advance
BR
Giuseppe Proietti

descendant_command · 11-05-2017, 01:02 AM

Probably you can use header_checks to rewrite the To: header in the message body.

gproietti@gmail.com · 11-05-2017, 11:04 AM

Quote:

Originally Posted by descendant_command

Probably you can use header_checks to rewrite the To: header in the message body.

Thanks descendant_command , Looking for it, I found this:

http://wiki.bluelightav.org/display/...e+From+headers

Do you know for a good tutorial (and example) for apply header_checks ?

Another possibility I'm considering is to create a my own filter applying the below:

http://www.postfix.org/FILTER_README.html

descendant_command · 11-05-2017, 01:09 PM

Actually, your original method should change the To: in the body as well.

Quote:

Canonical address mapping

The cleanup(8) daemon uses the canonical(5) tables to rewrite addresses in message envelopes and in message headers. By default all header and envelope addresses are rewritten; this is controlled with the canonical_classes configuration parameter.

Maybe you need to look at this directive:

Quote:

canonical_classes (default: envelope_sender, envelope_recipient, header_sender, header_recipient)

What addresses are subject to canonical_maps address mapping. By default, canonical_maps address mapping is applied to envelope sender and recipient addresses, and to header sender and header recipient addresses.

Specify one or more of: envelope_sender, envelope_recipient, header_sender, header_recipient

gproietti@gmail.com · 11-06-2017, 11:06 AM

Thanks, I'll try it tomorrow in the evening, during a maintenance window.

gproietti@gmail.com · 11-07-2017, 11:51 PM

Hi,

I added the canonical_classes option but behaviour is not changing.

Quote:

recipient_canonical_maps = hash:/etc/postfix/myrecipientmap
canonical_classes=envelope_sender, envelope_recipient, header_sender, header_recipient

It changed the Delivered-To: field but the To: field remains with the original address

descendant_command · 11-08-2017, 12:37 AM

Don't know why - maybe implemented in a later version than yours.

Did you try the header_checks methid?
http://www.postfix.org/header_checks.5.html

A custom content filter seems like overkill and a lot of work and shouldn't be necessary.