At 20:32 07/08/2003 Tuesday, Michael Shannon wrote:
 >Contact the administrators of mail.dlhost.com to find out why.  I sometimes
 >find that the refusing domain is actually a secondary MX (because the
 >primary was offline or unavailable) and they either aren't aware that
 >they're secondary (nobody told them) or they stopped relaying a long time
 >ago and didn't update DNS.

Mike is right -- I see these kinds of intermittent errors more often
after the "normal' work day.

I've never met a secondary MX host that I "liked." ;-)


BTW, sometimes this error is due to a non-existent mailbox (for whatever
reason, sometimes due to authorization checking).