invalid mx record

  • From: "Jen" <jmar@xxxxxxxxxxxxxxx>
  • To: exchangelist@xxxxxxxxxxxxx
  • Date: Wed, 14 Apr 2004 09:07:53 -0600

When one of my users tryies to reply to an email received, they get the
following bounce back message. are they blocking emails from us?

Your message did not reach some or all of the intended recipients.
Subject:        RE: Timetables
Sent:   4/14/2004 10:18 AM

The following recipient(s) could not be reached:

'xxxx@xxxxxxx' on 4/14/2004 10:18 AM
There was a SMTP communication problem with the recipient's email server. 
Please contact your system administrator.
< #5.5.0 smtp;553 sorry, one of your MX records is invalid>

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