Outbound SMTP mail stops after 7-8 minutes

HCL Domino Domino Forum
1

I am trying to troubleshoot a problem with routing of outbound SMTP mail to a MIMESweeper server in our DMZ. This server is set up as the relay host for messages leaving the local internet domain, and we address it by IP address, not by name. Quite often during the day, after 7 or 8 minutes of successfully routing mail to the relay server, the Domino server (6.02 CF2) apparently just gives up routing external mail (although it continues to route internally). I have turned on the logging option SMTPClientDebug=3 , and the last log entries we get are these:05:24:46 PM [0196:0007-00BD] SMTPClient: Connection broken after a network read timeout

05:24:46 PM [0196:0007-00BD] SMTPClient: Attempting to SubmitMessage:

05:24:46 PM [0196:0007-00BD] SMTPClient: Attempting to Disconnect:

05:24:46 PM [0196:0007-00BD] SMTPClient: Connection already disconnected.

After the ‘connection broken’ message, the SMTP server does not appear to even attempt to route mail to the MIMESweeper server, until the router task is stopped and restarted.

Is anyone able to assist? It looks to me like a network communication problem, but I am unable to figure out why it sometimes routes OK for a few hours, and sometimes stalls every 10 minutes.

Thanks in advance,

Peter

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Subject: Outbound SMTP mail stops after 7-8 minutes - resolved

This issue has been resolved by changing the server configuration on the SMTP/Router - Restrictions and Controls - Tranfer Controls tab. The initial transfer retry interval is set to 15 minutes by default, and we changed it to 1 minute. I suspect that since we relay all internet mail to another server, as soon as one message stalled (for whatever reason: network problem, etc.), the router would “know” that it wouldn’t be able to deliver all the other messages destined for the same relay server.

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Subject: This worked for me too

Thanks for posting the resolution.