Postfix not the right tools for doing such filtration, it's MTA, not
antispam or reputation system. Fighting outbound spam is not an easy task
and requires continuous human resources no matter how your antispam is
good, while sender want to send spam he will do it on Nth attempt.
On Tue, 13 May 20
You can drop received header without dedicated postfix, just do it with
milter instead. Rspamd can do it for you with very small Lua script, and do
SPF/DKIM/DMARC & ARC all together.
--
*Best Regards,*
Dmitriy Alekseev
DevOps Engineer
On Sat, 10 May 2025, 21:37 Ken Biggs via Postfix-users, <
pos
Can you say why do you drop Mime-Version header? This should never be done!
You can without issues drop some received header, but your regex is bad.
On Sat, 10 May 2025, 20:33 Ken Biggs via Postfix-users, <
postfix-users@postfix.org> wrote:
> So continuing the saga ... digging into /etc/postfix/h
Did maybe you considering spin up rspamd proxy + normal instead of
sa+opendkim+opendmarc, even if you do not move in end to rspamd you will at
least get what issue relates to. It useless to honestly trying to analyze
eml with modifications due to anonymization in scope of understanding why
dkim bro
Just curious why not use proper tools for files like S3, SFTP, NFS, CephFS,
Services like NextCloud and so on? SMTP is not designed to be used to
transfer big amounts of data and it can't transfer data in binary format
and do it in parallel so I really don't know why you at all looking in
SMTP for
It works if next hop accept email inside of smtp session and then fails,
this not a problem.
--
*Best Regards,*
Dmitriy Alekseev
DevOps Engineer
On Sat, 19 Apr 2025, 16:12 Benny Pedersen via Postfix-users, <
postfix-users@postfix.org> wrote:
> Dmitriy Alekseev via Postfix-users skrev
Reverse path is must to be in place to properly process bounces back if due
to any reason dst will fail to get email, and that's all.
--
*Best Regards,*
Dmitriy Alekseev
DevOps Engineer
On Sat, 19 Apr 2025, 15:40 Viktor Dukhovni via Postfix-users, <
postfix-users@postfix.org> wrote:
> On Sat, A
I do not rewrite any headers and have 0 intention to do so as it break
existing dkim and arc signatures. No modification except envelopes needed.
--
*Best Regards,*
Dmitriy Alekseev
DevOps Engineer
On Sat, 19 Apr 2025, 13:10 Viktor Dukhovni via Postfix-users, <
postfix-users@postfix.org> wrote:
Are you using long queue ids? Or short? Short one has a big collision field
and basically mostly depends on time, so I can assume you got bunch of spam
in one period of time. Again: queue-id is your local id, it has nothing
outside of your system, except cases when sending side get logged "250
queu
Queue ID has nothing to do with indication of spam or not. It's unique
identifier inside postfix for specific email, it not mean anything outside
of it.
On Thu, 17 Apr 2025, 09:53 Doug Hardie via Postfix-users, <
postfix-users@postfix.org> wrote:
> Lately, when I look at the mail queue I see IDs
Other option also would be to use antispam solutions and write such rules
there, they allow much more complex logic and if your intention to prevent
spam - antispam system that has sane defaults is good choice. Postfix can
work with any milter compatible antispam like Rspamd or SpamAssassin. I
pers
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