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): (my.account@domain.com is my iRedMail email account)
x-store-info:D6taffyBScEUZsL+ZXbbDvsjG9szfvD7
Authentication-Results: hotmail.com; spf=none (sender IP is 65.54.190.158; 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 header.id=postmaster@mail.hotmail.com
X-SID-PRA: postmaster@mail.hotmail.com
X-AUTH-Result: NONE
X-SID-Result: NONE
X-Message-Delivery: Vj0xLjE7RD0wO0dEPTA7U0NMPTk7bD0xO3VzPTE=
X-Message-Info: AuEzbeVr9u5fkDpn2vR5iCu5wb6HBeY4iruBjnutBzpStnUabbM/X3OHG1tkHI7a3kMiU15mwZkdItk0fkPUd26iJME4hbgAI/g6pso0Zyh7O0XVOq5g8hCf8Efy9J5lKkdwprP9EhP7RM0PyiUzXIPU4Cw0bszt
Received: from bay0-omc3-s20.bay0.hotmail.com ([65.54.190.158]) by BAY0-MC2-F53.Bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4900);
Thu, 28 Nov 2013 08:17:46 -0800
From: postmaster@mail.hotmail.com
To: outlookacc@outlook.com
Date: Thu, 28 Nov 2013 08:17:46 -0800
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
boundary="9B095B5ADSN=_01CEE9A2F3B1CC54000279A5bay0?omc3?s20.ba"
X-DSNContext: 7ce717b1 - 1413 - 00000004 - C00402D1
Message-ID: <b0zrAXBir000163bd@bay0-omc3-s20.bay0.hotmail.com>
Subject: Delivery Status Notification (Delay)
Return-Path: <>
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.--9B095B5ADSN=_01CEE9A2F3B1CC54000279A5bay0?omc3?s20.ba
Content-Type: text/plain; charset=unicode-1-1-utf-7This 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.
my.account@mydomain.com
--9B095B5ADSN=_01CEE9A2F3B1CC54000279A5bay0?omc3?s20.ba
Content-Type: message/delivery-statusReporting-MTA: dns;bay0-omc3-s20.bay0.hotmail.com
Received-From-MTA: dns;BAY407-EAS275
Arrival-Date: Wed, 27 Nov 2013 20:14:52 -0800Final-Recipient: rfc822;my.account@mydomain.com
Action: delayed
Status: 4.4.7
Will-Retry-Until: Fri, 29 Nov 2013 20:13:42 -0800--9B095B5ADSN=_01CEE9A2F3B1CC54000279A5bay0?omc3?s20.ba
Content-Type: message/rfc822Received: from BAY407-EAS275 ([65.54.190.188]) by bay0-omc3-s20.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675);
Wed, 27 Nov 2013 20:14:52 -0800
X-TMN: [j8CYJ7Mxj4P2YJdHVFTjXjQ7wVTM2+ih]
X-Originating-Email: [outlookacc@outlook.com]
Message-ID: <BAY407-EAS27505ACF601C89972E7621DCFEE0@phx.gbl>
Return-Path: outlookacc@outlook.com
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Subject: Test cerb
From: S J <outlookacc@outlook.com>
Date: Wed, 27 Nov 2013 23:14:51 -0500
To: "my.account@mydomain.com" <my.account@mydomain.com>
MIME-Version: 1.0 (1.0)
X-OriginalArrivalTime: 28 Nov 2013 04:14:52.0106 (UTC) FILETIME=[62B572A0:01CEEBF0]Test relay
Sent from my iPhone
--9B095B5ADSN=_01CEE9A2F3B1CC54000279A5bay0?omc3?s20.ba--
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