[mcstas-users] Message could not be delivered

[The Post Office]

The original message was received at Mon, 10 Aug 2015 09:12:57 +0700 from [144.238.235.83]

----- The following addresses had permanent fatal errors -----
<mcstas-users at mcstas.org>

----- Transcript of session follows -----
... while talking to mail server mcstas.org.:
554 Service unavailable; [99.78.28.94] blocked using bl.spamcop.net
Session aborted, reason: lost connection

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