sendmail: clientmqueue directory storing massive messages, not being cleared

[Gregory Neil Shapiro]

> I never even knew that directory existed.  I thought everything queued was
> kept in /var/spool/mqueue (which, I might add is being taken care of on a
> regular basis.. just seems the problem lies in the /var/spool/clientmqueue
> directory).  Is this a new thing that I'm stupidly unaware of?
> 
> Can you please explain the difference between /var/spool/clientmqueue and
> /var/spool/mqueue and why one seems to be taken care of regularly, but the
> other had 42,000 unsent messages?  When I start sendmail, I've always just
> run "/usr/sbin/sendmail -bd -q60m -h10 -R full".  Do I need to do something
> differently?

Please read /etc/mail/README (or /usr/src/etc/mail/README if you don't
keep /etc/ up to date).  Also, `man rc.sendmail` for more information
about sendmail startup.