Interpreting an SMTP protocol log
Posted on 2008-10-09
Email service is provided by an Exchange Server within a Windows SBS Server 2003 SP2 R2 environment.
I am in discussion with a phone billing software support person. The software periodically polls phone calls from a PABX and send the software provider an email attaching a report.
It appears to have worked okay for a few months. But has now stopped working.The scheduled emails are not reaching them, it is claimed.
The software provider insists (and rather rudely if I may add) that the fault lies entirely with our mail server. They offer no suggestions, except stubbornly maintain that;
- their logs show that our mail server had accepted the outbound messages (I have not seen these logs myself)
- they do not use an authenticated network user account to send; our mail server accepts anonymous logons (as proven by their log)
My question is two-fold.
1) I had always assumed that by default, Exchange Server will only accept for delivery, messages from an authenticated user. I have been able to check and verify that relay is not enabled (as by default).
How do I check/verify that anonymous logon sending is still rejected. Or as been turned on for some reasons.?
2) I have now turned on SMTP protocol logging, for the next few days.
In interpretating the log, what should I look for to verify that our mail server accepted and successfully (or otherwise) deliver messages to a given email domain.
I might add that apart from the above, the mail server appears to be working normally.
Your assistance in helping me resolve this issue would be most appreciated.
In the process, I would also be able to salvage some or my credibilty.