[IMail Forum] 10-30 minute delivery problems

[SKNIGHT]

I recently posted this on the IMail forums.  I had been running IMail 7.15 with mxGuard for almost a year now, and recently we had a virus, that generated hundred of bad mails (creating an undeliverable loop generating hundreds of other mails).  I removed the spam filter for a couple days, but the default smtp32.exe seems to have a 10-30 minute delay on all mail sent through it.     Does anyone have an explanation for that?   It seems the spool folder gets up to about 400 files, then drops down to about 30-70 files (as if it were delivering lots of mail at one shot every few minutes).  I cleaned up the spool, and the web folder for any old entries, and even started from a clear complete empty spool, but all of my clients were complaining about a 10-30 minute delay between mails.  This includes sending mail between people on the same machine on the same domain in the same physical location.   Any help would be appreciated, thanks.