I keep getting those messages for the last few days.
I'm not sure I get all of my messages too:
The original message was received at Thu, 9 Feb 2006 04:25:11 -0700 from myipaddress
----- The following addresses had transient non-fatal errors -----
<youknowwhatgoeshere@spamgourmet.com>
----- Transcript of session follows -----
451 4.4.1 reply: read error from gourmet.spamgourmet.com.
<youknowwhatgoeshere@spamgourmet.com>... Deferred: Connection reset by gourmet.spamgourmet.com.
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old