Resolved emails sent to non-existent addresses not being rejected

[sweetp]

Server operating system version

Ubuntu 22.04.4 LTS

Plesk version and microupdate number

18.0.61 Update #4

I have all my domain mail accounts configured to reject Mail sent to non-existent users. However this mail is sent to the the address defined in My Profile

 

[Kaspar@Plesk]

I am afraid I don't follow. What mail is send the the email address defined at the users profile?

 

[sweetp]

I have plesk configured to reject mails to non existent users. If someone sends an email to a non existent user, it ends up in the inbox for my admin account.

 

[Kaspar@Plesk]

And the admin email address would a mailbox on the same server too?

 

[sweetp]

Yeah that’s correct

 

[Kaspar@Plesk]

What does the mail log look like for a mail sent to an non-existent user?

 

[sweetp]

it seems to be working right now...
Ill repost if it happens again

 

[Markus G.]

I have the same error on several servers (Plesk Obsidian 18.0.62)
Mail for unknown emailaddress of any domain on the server get to the Email registered in the Admin Profile (in my case an external email address).
These are no sendmail mails, normal mails coming from outside. Example here:
Mail wants to get the mail first to the unknown address, after redirecting to unknownaddress@localhost.localdomain and then getting to the Administrator Emailaddress
---------------------------------------------------------------------------------
From - Wed Aug 21 08:25:43 2024
X-Account-Key: account1
X-UIDL: UID250879-1582818771
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
X-Mozilla-Keys:
Return-Path: <info@info.com>
X-Original-To: EMAILADDRESSOFPLESKADMIN
Delivered-To: EMAILADDRESSOFPLESKADMIN
Received: from PLESKSERVER (PLESKSERVER [PLESKIP])
by MYMAILSERVEROUTSIDEPLESK (Postfix) with ESMTPS id 4FA6B1246C4
for <EMAILADDRESSOFPLESKADMIN>; Wed, 21 Aug 2024 08:17:18 +0200 (CEST)
Received: by PLESKSERVER (Postfix)
id DB20A18009F; Wed, 21 Aug 2024 08:17:17 +0200 (CEST)
Delivered-To: UNKNOWNADDRESS@localhost.localdomain
Received: from babakasabaka.ru (unknown [103.109.100.173])
byPLESKSERVER (Postfix) with ESMTPS id E7D1518002D
for <UNKNOWNADDRESS@DOMAINONPLESKSERVER>; Wed, 21 Aug 2024 08:17:13 +0200 (CEST)
Authentication-Results: PLESKSERVER;
spf=softfail (sender IP is 103.109.100.173) smtp.mailfrom=info@info.com smtp.helo=babakasabaka.ru
Received-SPF: softfail (PLESKSERVER: transitioning domain of info.com does not designate 103.109.100.173 as permitted sender) client-ip=103.109.100.173; envelope-from=info@info.com; helo=babakasabaka.ru;
Message-ID: <25b9f259d3d15a51760c45ee5ffbd0ce27ab57@info.com>
From: Serenity Cantu <info@info.com>
To: UNKNOWNADDRESS@DOMAINONPLESKSERVER
Subject: Your bonus
Date: Wed, 21 Aug 2024 08:17:02 +0300
MIME-Version: 1.0
Content-Type: multipart/related; boundary="09a394f9ac68469dbe1418d326f71644d8"
.........

 

[Sebahat.hadzhi]

Hello, @Markus G. Please check the following support article. Please let us know if that helped.

 

[Markus G.]

perfect, this solved the problem

 

[Markus G.]

sorry again, I thought this solved the problem, but it doesn't. I continue receiving root@localhost even having root: /dev/null in etc/aliases and checked that postfix has accepted it with your script. Any other proposel?

 

[Markus G.]

I solved it temporarily with adding mailfilters as the original destination is in the A: tag. So filtering is quiet easy.