----- Message from Wietse Venema <wie...@porcupine.org> ---------
Date: Thu, 31 Oct 2019 08:20:44 -0400 (EDT)
From: Wietse Venema <wie...@porcupine.org>
Reply-To: Postfix users <postfix-users@postfix.org>
Subject: Re: Avoidance of duplicate mails reg
To: Postfix users <postfix-users@postfix.org>
an...@ursc.gov.in:
Hi,
We have migrated to a new domain yyy.com. We also continue to receive
mails on old domain xxx.com.
When a sender sends a mail to a...@xxx.com (old domain), mail is
received and delivered to user abcd. Abcd when he replies to all (his
from email address will be a...@yyy.com [new domain], and hence, mail
is also sent to a...@xxx.com [old domain]. So, the sent mail is also
received back to the same sender.
When the actual recipient receives the mail, he will have a...@xxx.com
and a...@yyy.com in the address list. So, when he replies to that
mail, 2 mails will be sent to the same user.
What's the best way that, the user receives only one mail, when both
domains are in To addresses?
/etc/postfix/main.cf:
virtual_alias_maps =
hash:/etc/postfix/old-to-new ...other existing maps...
/etc/postfix/old-to-new:
abcd@old.example abcd@new.example
# postmap /etc/postfix/old-to-new
# postfix reload
Instead of hash, you can use any supported type.
Wietse
----- End message from Wietse Venema <wie...@porcupine.org> -----
Thank you.
Anant S Athavale
------------------------------------------------------------------------------
IMPORTANT NOTE:
ISRO Satellite Centre (ISAC) was renamed as U R Rao Satellite Centre (URSC).
Hence, the existing domain (isac.gov.in) is changed to new domain ursc.gov.in
resulting into change of e-mail address from u...@isac.gov.in to
u...@ursc.gov.in.
Please note this change and update your contact details for new domain
(ursc.gov.in).
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