Re: duplicates

I guess you have several options. One is using Dovecot with Sieve:

https://doc.dovecot.org/2.4.1/core/config/sieve/extensions/duplicate.html#si...

https://datatracker.ietf.org/doc/html/rfc7352

Op 18-9-2025 om 14:49 schreef Kevin Kretz via dovecot:

Hi,
We use Dovecot and Postfix for internal emails and keep aliases in an LDAP
table.  We have multiple sites, with some user mailboxes local to each.
If user A and B are both in alias OurGroup, and a message is sent to
[1]ourgroup@domain.com [2]a@domain.com and [3]b@domain.com, a and b will
receive two copies of the message.
Should this be addressed with Postfix or Dovecot?
thanks

References

Visible links
1. mailto:ourgroup@domain.com
2. mailto:a@domain.com
3. mailto:b@domain.com,

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