We just moved the mail back to our old server and it is now sending mail perfectly. We are using SMTP AUTH for all of our clients We do send alot of mail. This is over a 3 day period now we have been having problems.
Do you normally send 500,000 E-mails over that 3 day period? That's a lot more than most IMail users (although there are certainly some with that volume). If not, or if you are not sure, I would urge you to look at several of the D*.SMD files in the spool directory. They should provide a clue as to what is happening.
Do you know anything about using Declude and having the computer name end it a number instead of a letter and it then being confuses as a IP address?
Older versions of Declude would assume that any domain name ending in a number was an IP address (since it's illegal for a domain name to end in a number). However, we have had several people who have a very odd setup (for example, where internal mail can be sent to "[EMAIL PROTECTED]" instead of "[EMAIL PROTECTED]"), and if you do something like this *and* have the domain end in a number ("[EMAIL PROTECTED]"), it would confuse Declude.
The only problem is that you would get a warning in the log file, and this was changed a while back.
-Scott
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