Quoting Brian (lxy at cloudnet.com):
> I'm having random problems with sendmail.  I'm running 8.9.3.
> 
> Every so often, mail gets hung up in mqueue.  It stays hung up for as long
> as a day, then decides to send.  mailq shows me that my messages are
> 'deferred', nothing more.  Any ideas what causes this?

8.9.3? 

Time to upgrade!

Look at all the security issues that have been fixed.

ftp://ftp.sendmail.org/pub/sendmail/RELEASE_NOTES
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