[clug] Postfix, a lot of connection attempts

[Paul Warren]

Hi guys,

Got some log lines in my postfix log that I don't know enough about to 
say if it's a config problem, or I'm getting spammed. Google hasn't been 
terribly helpful either!

Every second since about 8am this morning, I've had the following appear:

Dec  3 10:12:10 pwarren postfix/smtpd[10164]: connect from 
e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:10 pwarren postfix/smtpd[10164]: lost connection after 
UNKNOWN from e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:10 pwarren postfix/smtpd[10164]: disconnect from 
e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:11 pwarren postfix/smtpd[10164]: connect from 
e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:11 pwarren postfix/smtpd[10164]: lost connection after 
UNKNOWN from e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:11 pwarren postfix/smtpd[10164]: disconnect from 
e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:12 pwarren postfix/smtpd[10164]: connect from 
e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:12 pwarren postfix/smtpd[10164]: lost connection after 
UNKNOWN from e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:12 pwarren postfix/smtpd[10164]: disconnect from 
e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:13 pwarren postfix/smtpd[10164]: connect from 
e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:13 pwarren postfix/smtpd[10164]: lost connection after 
UNKNOWN from e297.enterprise.fastwebserver.de[5.199.132.42]
Dec  3 10:12:13 pwarren postfix/smtpd[10164]: disconnect from 
e297.enterprise.fastwebserver.de[5.199.132.42]


The most recent change was early last week when I added spamassassin 
processing into the queue.

It's not affecting services so far, I'm still getting emails coming in, 
but it's making my logs annoying large!

The IP and hostname don't seem to be in any blacklists.

Is it most likely a problem at their end or mine?

Cheers
--
Paul Warren