Email Loop on ... [e-mail]

[SB]

If a mailbox receives a bounceback or error message from [e-mail] and replies to it, the reply seems to get stuck in an infinite loop.

A client did this yesterday and for 24 hours its been sending back and forward, over 14,000 log entries.

[Scott MacDonald]

Sending back and forth between what accounts?

Mailer-daemon and Mailer-daemon?

[SB]

Hi Scott,

Received: from localhost (Unknown [127.0.0.1]) by mail.domain.co.uk (Haraka) with ESMTPS id 7989FDC4-7050-4472-A9FA-F5BFADEF518D.1 envelope-from [e-mail] (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 verify=FAIL); Tue, 26 Mar 2019 22:27:38 +0000

Received: from localhost (Unknown [127.0.0.1]) by mail.domain.co.uk (Haraka) with ESMTPS id 9292FC05-7FE4-4257-94F3-CD35BBD62458.1 envelope-from [e-mail] (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 verify=FAIL); Tue, 26 Mar 2019 22:27:13 +0000

Received: from localhost (Unknown [127.0.0.1]) by mail.domain.co.uk (Haraka) with ESMTPS id 86F06A9A-1519-4C0E-B483-34037813979D.1 envelope-from [e-mail] (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 verify=FAIL); Tue, 26 Mar 2019 22:27:09 +0000

Received: from localhost (Unknown [127.0.0.1]) by mail.domain.co.uk (Haraka) with ESMTPS id 3ADD773A-7C7A-4676-87D4-9767A0BC4AF7.1 envelope-from [e-mail] (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 verify=FAIL); Tue, 26 Mar 2019 22:26:39 +0000

Received: from localhost (Unknown [127.0.0.1]) by mail.domain.co.uk (Haraka) with ESMTPS id 3E08C53D-3649-4F93-8360-31231167FB44.1 envelope-from [e-mail] (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 verify=FAIL); Tue, 26 Mar 2019 22:26:36 +0000

Received: from localhost (Unknown [127.0.0.1]) by mail.domain.co.uk (Haraka) with ESMTPS id E0150781-3E10-4440-A200-C3197672785F.1 envelope-from [e-mail] (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 verify=FAIL); Tue, 26 Mar 2019 22:26:05 +0000

Received: from localhost (Unknown [127.0.0.1]) by mail.domain.co.uk (Haraka) with ESMTPS id 225161A7-F05E-4AED-8737-985EA52705B8.1 envelope-from [e-mail] (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 verify=FAIL); Tue, 26 Mar 2019 22:26:01 +0000

Received: from localhost (Unknown [127.0.0.1]) by mail.domain.co.uk (Haraka) with ESMTPS id AACBE1E0-230C-4DE6-88CD-3E43C75E9A91.1 envelope-from [e-mail] (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 verify=FAIL); Tue, 26 Mar 2019 22:25:29 +0000

[SH]

Do you know what message it contains? These mails are in loop with other mailserver or inside only?

(bounces per RFC are sent with "<>" as return address at envelope, so there should not be any loop at all)

[SB]

I am going to dig through the logs in more detail and post back. The message was a test I sent after noticing the issue, it was simply a reply from outlook on the delivery failure message which had 'test' written in it.

[SB]

I am going to close this while I upgrade to the latest version with the new mail queue feature and see if it re-occurs.