Hi all,
I don't know if this question has already been ask, but I did not find
anything in the archive of the mailing-list.
I co-manage a postfix-server for an hobby-club. We provide
email-addresses to our members, which are linked to aliases, so we
forward the mails to the personal email-address of the member.
(The goal is to provide an email-address to the members, dedicated for
the hobby, which helps to shield-of the personal email-address of the
members).
Anycase, while looking into the log-files of postfix for another issue,
I noticed this:
---
Dec 17 04:32:05 smtp postfix/smtp[725772]: 4F58E6A10A0:
[email protected],
[email protected],
relay=mail.example.com[A.B.C.D]:25, delay=0.16, delays=0.05/0/0.08/0.02,
dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 714F7294BB2)
---
(personal information replaced for privacy-reason)
"[email protected]" is just an email-address
"ourhobbyciubdomain.com" is the domain used by our organization.
So, it looks like somebody is sending use emails with a
[email protected] as DESTINATION.
The net result seems to be that these mails are actually relayed by our
server, although we normally have a rule that we only relay
email-addresses of our members ("[email protected]")
I don't know if this is normal that the SRS is used in the destination
address? ( "SRS" does mean "SENDER rewriting Sceme" doesn't it?)
What is the configuration to block this?
Thanks for any help :-)
Kr. Bonne.
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