by rob » Sat Jan 08, 2011 12:13 pm
There could be a couple reasons for this. The first is the SMTP server is busy and as no available connections available, which would mean there is a reason behind the excessive traffic. The next cause is that even though the account is local, the mail server is trying to send the mail out. I would recomend checking your configuration and tracing your delivery through the logs to find out why this could be occuring. IF you have more than one mail server in your setup, then that is the most liekly reaosn, but with a single mail server, it could be possible that your mail is passing through some other layer of SMTP software (antivirus, spam, or firewall filter).