[rules-users] Returned mail: Data format error

[Post Office]

Dear user rules-***@lists.jboss.org,

We have received reports that your account was used to send a large amount of junk e-mail messages during the last week.
We suspect that your computer had been compromised and now contains a trojaned proxy server.

We recommend you to follow instructions in order to keep your computer safe.

Best regards,
The lists.jboss.org team.

[Returned mail]

The original message was included as attachment

[The Post Office]

The original message was received at Tue, 24 May 2016 16:52:46 +0530
from lists.jboss.org [97.28.110.180]

----- The following addresses had permanent fatal errors -----
<rules-***@lists.jboss.org>

----- Transcript of session follows -----
<<< 550 MAILBOX NOT FOUND

[Returned mail]

The original message was received at Wed, 25 May 2016 08:52:10 +0700 from 45.151.173.55

----- The following addresses had permanent fatal errors -----
<rules-***@lists.jboss.org>