[rules-users] Returned mail: Data format error

[MAILER-DAEMON]

The original message was received at Sat, 5 Mar 2016 17:50:43 +0530 from 8.223.56.176

----- The following addresses had permanent fatal errors -----
<rules-users at lists.jboss.org>

----- Transcript of the session follows -----
... while talking to 184.141.141.199:
>>> MAIL From:"MAILER-DAEMON" <postmaster at lists.jboss.org>
<<< 505 "MAILER-DAEMON" <postmaster at lists.jboss.org>... Refused

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