[TiLUG] Mail delivery failed: returning message to sender

[Mail Delivery System]

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  samp.du@libero.it
    Domain mestolo.de has exceeded the max defers and failures per hour (5/5 (83%)) allowed. Message discarded.
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