[SOLVED] Mail server log file question

[DSK]

I found this in my log file for postfix. I assume its an attempt to compromise my system. Do I have anything to be concerned about?

Jan 1 01:51:22 ###### postfix/smtpd[6541]: connect from 203-70-51-232.adsl.dynamic.seed.net.tw[203.70.51.232]
Jan 1 01:51:23 ###### postfix/smtpd[6541]: NOQUEUE: reject: RCPT from 203-70-51-232.adsl.dynamic.seed.net.tw[203.70.51.232]: 554 5.7.1 <evo86tw@gmail.com>: Relay access denied; from=<baby@gmail.com> to=<evo86tw@gmail.com> proto=SMTP helo=<###.###.###.###>
Jan 1 01:51:24 ###### postfix/smtpd[6541]: lost connection after RCPT from 203-70-51-232.adsl.dynamic.seed.net.tw[203.70.51.232]
Jan 1 01:51:24 ###### postfix/smtpd[6541]: disconnect from 203-70-51-232.adsl.dynamic.seed.net.tw[203.70.51.232]
Jan 1 01:54:44 ###### postfix/anvil[6544]: statistics: max connection rate 1/60s for (smtp:203.70.51.232) at Jan 1 01:51:22
Jan 1 01:54:44 ###### postfix/anvil[6544]: statistics: max connection count 1 for (smtp:203.70.51.232) at Jan 1 01:51:22
Jan 1 01:54:44 ###### postfix/anvil[6544]: statistics: max cache size 1 at Jan 1 01:51:22

Jan 1 13:21:42 ###### postfix/smtpd[9278]: connect from unknown[218.16.119.142]
Jan 1 13:21:42 ###### postfix/smtpd[9278]: NOQUEUE: reject: RCPT from unknown[218.16.119.142]: 554 5.7.1 <dvdr0503@yahoo.com.cn>: Relay access denied; from=<youipopo@yahoo.com> to=<dvdr0503@yahoo.com.cn> proto=SMTP helo=<###.###.###.###>
Jan 1 13:21:43 ###### postfix/smtpd[9278]: lost connection after RCPT from unknown[218.16.119.142]
Jan 1 13:21:43 ###### postfix/smtpd[9278]: disconnect from unknown[218.16.119.142]
Jan 1 13:25:03 ###### postfix/anvil[9280]: statistics: max connection rate 1/60s for (smtp:218.16.119.142) at Jan 1 13:21:42
Jan 1 13:25:03 ###### postfix/anvil[9280]: statistics: max connection count 1 for (smtp:218.16.119.142) at Jan 1 13:21:42
Jan 1 13:25:03 ###### postfix/anvil[9280]: statistics: max cache size 1 at Jan 1 13:21:42

[MJN]

Not so much 'compromise', but rather an attempt to use you as relay for spam in the hope that you're an 'open relay' (i.e. willing to relay mail for unauthenticated/untrusted clients).

Your server is behaving correctly so nothing to worry about.

Mathew

[DSK]

Thank you much for the reply. Wanted to make sure I was being responsible server admin!

:guitar: