Question internal mails from same domain going to spam folder of one recipient roundcube spam/junk folder

[Deepak M]

Hello everyone,

We are facing typical issue with one of our client domain saaXXXXX.com hosted on Linux Plesk 12.5

If [email protected] send email to mrx@saaXXXXX.com ( internal mails) using outlook or webmail it goes to webmail spam folder

We tried sending email from another domain hosted on same server or gmail or yahoo id it goes to inbox

We took below actions but same problem persist

1. We deleted mailbox of mrx@saaXXXXX.com and recreated again
2. Changed password of this account and not given to user and sent test email from [email protected] or any other id of saaXXXXX.com
3. checked for Message Rules in Outlook or mobile no rules are crated
4. We enabled spam filter and disabled it again

After changing password it was not updated in Outlook so there is no possibility of outlook marking email as Junk/Spam

Even message headers do not show any spam filter is triggered

Below are sample message headers

Return-Path: <[email protected]>
X-Original-To: [email protected]
Delivered-To: [email protected]
Received: from webmail.saaXXXXX.com (yyyyyy.in [IPv6:::1])
(Authenticated sender: [email protected])
by plesk.yyyyyy.in (Postfix) with ESMTPA id 4D27A1A14B8
for <[email protected]>; Tue, 5 Jun 2018 16:56:55 +0530 (IST)
MIME-Version: 1.0
Date: Tue, 05 Jun 2018 16:56:55 +0530
From: [email protected]
To: [email protected]
Subject: Test 4.56
Message-ID: <[email protected]>
X-Sender: [email protected]
User-Agent: Roundcube Webmail/1.2.7
X-PPP-Message-ID: <[email protected]>
X-PPP-Vhost: saaXXXXX.com

This issue does not persist for any other id of saaXXXXX.com or other domain hosted on same server

No spam filter is active on server or domain or user, also no additional filters created in Postfix

We checked in logs, no rules are being triggered

Can any one suggest what could be issue and how it can be resolved?

 

[Konrad]

Did you resolved your issue? I have the same problem.