INCONSISTENT "connection was dropped" message in Exchange 2003 SMTP

[Dimarc67]

Hi.

I'm running an Exchange 2003 Server w/SP1. It's been in place for many months with no issues. SMTP is set to allow relaying by authenticated computers, and operates quite nicely when sending via POP-accounts configured on internal machines.

However, a new problem is occurring, and it's very, very specific. I'd like our IBM Director Server to e-mail my personal e-mail address with event notifications. My personal e-mail address domain is my own, and e-mail sent to that domain is merely redirected to a mainstream e-mail provider.

If I set IBM Director to use my internal e-mail address, and specify the Exchange server for SMTP, I receive the e-mails without issue. However, if I set it to use my personal e-mail address, the e-mail hangs in a queue on the Exchange server with a "connection was dropped due to an SMTP protocol event sink" error.

Now here's the kicker: If send an e-mail to the same address from my desktop computer via a POP-account, it goes through the queue without issue and is received--ONLY if no messages from the Director Server are waiting.

So only messages from the Director server hang, and they hold up other messages that will go through but for the clog.

Not able to get a handle on the logic train here...

Little help?? Thanks!

David Marcus
David@Dimarc.com

 

[MikeBatters]

I would guess that this is something in the SMTP Headers or similar that is causing the problem.

Do you have any way of diagnosing the SMTP syntax being used by the Director server?