My server keeps sending emails to [email protected]

Posted by xtrimsky on Server Fault See other posts from Server Fault or by xtrimsky
Published on 2014-06-04T19:45:46Z Indexed on 2014/06/04 21:28 UTC
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When I type mailq on my server, I get:

BB523653A62     4025 Wed Jun  4 10:40:07  MAILER-DAEMON
(delivery temporarily suspended: host p3smtpout.secureserver.net[208.109.80.54] refused to talk to me: 554 p3plsmtpout002.prod.phx3.secureserver.net : DED : AJeb1o0334uf1Y801 : DED : You've reached your daily relay quota - IP.ADDRESS)
                                         [email protected]

B33AD653A4A     4025 Wed Jun  4 08:20:07  MAILER-DAEMON
(delivery temporarily suspended: host p3smtpout.secureserver.net[208.109.80.54] refused to talk to me: 554 p3plsmtpout002.prod.phx3.secureserver.net : DED : AJeb1o0334uf1Y801 : DED : You've reached your daily relay quota - IP.ADDRESS)
                                         [email protected]

B77DF653A63     4025 Wed Jun  4 10:50:07  MAILER-DAEMON
(delivery temporarily suspended: host p3smtpout.secureserver.net[208.109.80.54] refused to talk to me: 554 p3plsmtpout001.prod.phx3.secureserver.net : DED : AJvF1o00L4uf1Y801 : DED : You've reached your daily relay quota - IP.ADDRESS)
                                         [email protected]

B943C653A3C     4025 Wed Jun  4 06:40:07  MAILER-DAEMON
(delivery temporarily suspended: host p3smtpout.secureserver.net[208.109.80.54] refused to talk to me: 554 p3plsmtpout001.prod.phx3.secureserver.net : DED : AKBv1o00P4uf1Y801 : DED : You've reached your daily relay quota - IP.ADDRESS)
                                         [email protected]

(there is probably about 50 of these, and I've cleared the queue today), do you know where these could be coming from ? is it my server sending some logs to "hostmaster" ? I've replaced my actual domain, with "MYDOMAIN".

How can I find what could be sending these emails ? The server has recently been hacked so I'm also a bit worried.

Thanks!

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