Topic: iRedMail domains/accounts suddenly unable to receive e-mail
==== Required information ====
- iRedMail version: 0.8.5
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP Backend
- Linux/BSD distribution name and version: Debian 7 Wheezy
- Related log if you're reporting an issue: Attached
NOTE: My iptables rules are attached as a file to this post.
Greetings Thanks again Zhang for a very elegant unix mail server solution.
I have iRedMail 0.8.5 running in a future-prod environment. This issue would be critical if the server was deployed, but it won't be for another month, so thankfully it isn't too bad!
The server has 2GB of RAM with 4GB of swap space and a quad core processor.
My iRedMail instance has simply stopped being able to receive mail. /var/log/mail.log is updated when I try to send mail from RoundCube (using SMTP on the machine) but there is no logging done when I try send mail TO an iRedMail account on the machine. I get an e-mail back some 12 hours layer stating "MAIL DELIVERY TO <iredmail account on domain> DELAYED".
To my knowledge I haven't changed ANYTHING related to iRedMail, and I have DNS configured successfully, so I am somewhat stumped here. It was working fine maybe 7 days ago, and sometime this week it simply stopped.
Here is the content of the message sent to me (saying delivery is delayed) from when I try to send e-mail to an iRedMail account (including headers and original e-mail): (firstname.lastname@example.org is my iRedMail email account)
Authentication-Results: hotmail.com; spf=none (sender IP is 188.8.131.52; identity alignment result is pass and alignment mode is relaxed) smtp.helo=bay0-omc3-s20.bay0.hotmail.com; dkim=none (identity alignment result is pass and alignment mode is relaxed) header.d=mail.hotmail.com; x-hmca=none email@example.com
Received: from bay0-omc3-s20.bay0.hotmail.com ([184.108.40.206]) by BAY0-MC2-F53.Bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4900);
Thu, 28 Nov 2013 08:17:46 -0800
Date: Thu, 28 Nov 2013 08:17:46 -0800
Content-Type: multipart/report; report-type=delivery-status;
X-DSNContext: 7ce717b1 - 1413 - 00000004 - C00402D1
Subject: Delivery Status Notification (Delay)
X-OriginalArrivalTime: 28 Nov 2013 16:17:46.0141 (UTC) FILETIME=[5FA5F4D0:01CEEC55]
This is a MIME-formatted message.
Portions of this message may be unreadable without a MIME-capable mail program.
Content-Type: text/plain; charset=unicode-1-1-utf-7
This is an automatically generated Delivery Status Notification.
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
Delivery to the following recipients has been delayed.
Arrival-Date: Wed, 27 Nov 2013 20:14:52 -0800
Will-Retry-Until: Fri, 29 Nov 2013 20:13:42 -0800
Received: from BAY407-EAS275 ([220.127.116.11]) by bay0-omc3-s20.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675);
Wed, 27 Nov 2013 20:14:52 -0800
Content-Type: text/plain; charset="us-ascii"
Subject: Test cerb
From: S J <firstname.lastname@example.org>
Date: Wed, 27 Nov 2013 23:14:51 -0500
To: "email@example.com" <firstname.lastname@example.org>
MIME-Version: 1.0 (1.0)
X-OriginalArrivalTime: 28 Nov 2013 04:14:52.0106 (UTC) FILETIME=[62B572A0:01CEEBF0]
Sent from my iPhone