postfix- are these connects in the log anything to worry about?

Posted by Lock on Server Fault See other posts from Server Fault or by Lock
Published on 2012-09-10T01:06:32Z Indexed on 2012/09/10 3:39 UTC
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centos

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postfix

I am noticing the following in my maillog.

Lots of these:

Sep 10 10:29:56 westc01-01-01 postfix/smtpd[26788]: connect from unknown[85.111.7.182]

And these:

Sep 10 10:34:58 westc01-01-01 postfix/smtpd[26768]: disconnect from unknown[85.111.7.182]
Sep 10 10:34:58 westc01-01-01 postfix/smtpd[26758]: timeout after AUTH from unknown[85.111.7.182]

And these:

Sep 10 10:29:56 westc01-01-01 postfix/smtpd[26737]: warning: unknown[85.111.7.182]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Are these anything to worry about?

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