SMTP incoming problems?

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json
Posts: 227
Joined: Sun Aug 24, 2003 6:56 pm
Location: Denmark

SMTP incoming problems?

Post by json » Wed Oct 03, 2007 2:16 pm

I'm on version 2 of ME Pro, and have been for years (and version 1 before that). I have had very few problems with the mail server, but lately some of my clients complain that users have problems mailing them.

First off the problems were mainly with GMail (connection timeout), but now I have problems with other mail servers reporting connection timeout when trying to connect to my server.

I can't see anything in my SMTP logs, so I'm at a loss.

How many incoming concurrent connections do you allow on your server? My SMTP log is about 5-7 MB each day (to give you an idea on the amount of mails going in).

Thanks in advance,
Steen

json
Posts: 227
Joined: Sun Aug 24, 2003 6:56 pm
Location: Denmark

Post by json » Fri Oct 05, 2007 4:01 pm

Ok, I think I've found one of the entries in the debug log:

10/05/07 12:16:14 ME-E0069: (recv) socket [892] disconnection from host 64.233.166.182 before any command received. Error: (10060)

What is this error 10060 ?? I get quite a lot of these. It doesn't look like an error on the server?? And what I have read about 10060, doesn't really match with gmail's servers (can hardly claim them to be spammers).

Thanks in advance,
Steen

Brett Rowbotham
Posts: 542
Joined: Mon Nov 03, 2003 7:48 am
Location: Cape Town

Post by Brett Rowbotham » Mon Oct 08, 2007 5:41 am

I had a similar problem recently on a Windows 2003 server and it was solved by lowering the MTU value for TCP/IP connection.

I can't locate the source where I found the setting to change but I know I searched the Microsoft website for MTU to find it. If I locate it again I will post back.

Cheers,
Brett

json
Posts: 227
Joined: Sun Aug 24, 2003 6:56 pm
Location: Denmark

Post by json » Mon Oct 08, 2007 6:44 am

Thank you! I really appreciate it!..

To try something desperate, I installed the new version 3. It's installed on another computer, on another network and behind another firewall, so not really a indicator, but no problems yet.

I'm getting mails from gmail, so that's good. I guess I might try and install version 3 on the server with problems and cross my fingers. If it doesn't help, I'm back to square one!

Thanks,
Steen

json
Posts: 227
Joined: Sun Aug 24, 2003 6:56 pm
Location: Denmark

Post by json » Sat Oct 13, 2007 7:23 am

Now I installed ME 3 Pro on my main server, same problem. So now I guess I have to pay $150, and I still have the same problem. Even tried to lower the MTU, didn't help. Guess I have to look at my switches and firewalls.. :cry:



/Steen

MailEnable-Ben
Posts: 5858
Joined: Fri Jan 16, 2004 6:49 am
Location: Melbourne

Post by MailEnable-Ben » Mon Oct 15, 2007 4:43 am

If it is a problem with the MTU settings then you will find in the MailEnable SMTP activity logs there are lots of inbound connections that are failing on the DATA command. The message will timeout on the DATA command and the inbound message will not have a QUIT.

This will usually mean that the remote server is not sending any DATA and both ends are waiting for the other to answer and when nothing happens the connection times out.

Here is some help with the MTU;

http://www.mailenable.com/kb/viewarticl ... 020063.htm
Regards,

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