Den 10.09.2024 07:10, skrev Viktor Dukhovni via Postfix-users:
Thank you SO much for taking the time. Appreciated!
On Mon, Sep 09, 2024 at 05:14:07PM +0200, Håkon Alstadheim via Postfix-users
wrote:
I got the attached report about a double bounce from my incoming postfix
server "Postfix SMTP server: errors from
nullbounce.com[116.202.14.127]:57394".
This wasn't a double-bounce, just an invalid SMTP recipient.
Ok, I see that now. Somehow my befuddled brain translated "nullbounce"
into some kind of null sender.
Rather,
your Postfix configuration sends detailed postmaster notices about
fairly routine events (errors). Personally, I don't enable such
notices. The default is:
notify_classes = resource, software
Yes, well, I need to be proactive for when my mom believes she's sent an
email but really has not.
When I realize that this error is totally bogus, I want to blackhole
that whole netblock.
An overreaction IMHO. Just turn off the notifications.
OK, thanks :-D
[...]
From: Mail Delivery System <mailer-dae...@incoming.alstadheim.priv.no>
Date: Mon, 9 Sep 2024 05:03:30 +0200 (CEST)
Subject: Postfix SMTP server: errors from
nullbounce.com[116.202.14.127]:57394
To: Postmaster <postmas...@alstadheim.priv.no>
Transcript of session follows.
Out: 220 incoming.alstadheim.priv.no ESMTP Postfix (Debian/GNU)
In: EHLO nullbounce.com
Out: 250-incoming.alstadheim.priv.no
Out: 250-PIPELINING
Out: 250-SIZE 512000000
Out: 250-VRFY
Out: 250-ETRN
Out: 250-STARTTLS
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250-SMTPUTF8
Out: 250 CHUNKING
In: RSET
Out: 250 2.0.0 Ok
In: MAIL FROM:<i...@nullbounce.com>
Out: 250 2.1.0 Ok
In: RCPT TO:<bent.jorgen...@alstadheim.priv.no>
Out: 550 5.1.1 <bent.jorgen...@alstadheim.priv.no>: Recipient address
rejected: User unknown in local recipient table
In: QUIT
Out: 221 2.0.0 Bye
Completely routine delivery failure to a non-existent address, not worth
your or anyone else's time. Just leave such traces in the logs, for
the rare case when you're troubleshooting inbound delivery issues.
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