[toaster] Email Clients Fail to send email -- hiccups

[John Harmon]

Quick question.  Lately I have noticed that my email client 
(Thunderbird) will fail to send emails out over smtp (doesn't matter 
over port 25 or 2525); however, I can send email out through the web 
client during this time. 

Looking at the server there are about a dozen email servers delivering 
mail to my server.

If I wait 3 to 5 minutes, things will send fine.  It acts like it is 
just a temporary hiccup, but it seems to happen to me once a day.

Any ideas as to why it may be doing this? ideas how to address the issue?

Thanks in advance,
John