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Old 6th October 2008, 05:56
cat cat is offline
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Default Relay access attempts

I am receiving the entries below in my mail log on a regular basis. Some times many times on one day. This IP address is not the only one making this attempt, there are several.

Is this a problem or potential problem?
Is there a way to block all attempts from these IP addresses?

Quote:
Oct 5 07:41:10 myserver postfix/smtpd[1877]: connect from 124-8-106-88.dynamic.tfn.net.tw[124.8.106.88]
Oct 5 07:41:11 myserver postfix/smtpd[1877]: lost connection after EHLO from 124-8-106-88.dynamic.tfn.net.tw[124.8.106.88]
Oct 5 07:41:11 myserver postfix/smtpd[1877]: disconnect from 124-8-106-88.dynamic.tfn.net.tw[124.8.106.88]
Oct 5 07:41:11 myserver postfix/smtpd[1877]: connect from 124-8-106-88.dynamic.tfn.net.tw[124.8.106.88]
Oct 5 07:41:16 myserver postfix/smtpd[1877]: warning: 124-8-106-88.dynamic.tfn.net.tw[124.8.106.88]: SASL LOGIN authentication failed: authentication failure
Oct 5 07:41:17 myserver postfix/smtpd[1877]: lost connection after AUTH from 124-8-106-88.dynamic.tfn.net.tw[124.8.106.88]
Oct 5 07:41:17 myserver postfix/smtpd[1877]: disconnect from 124-8-106-88.dynamic.tfn.net.tw[124.8.106.88]
Oct 5 07:44:37 myserver postfix/anvil[1882]: statistics: max connection rate 2/60s for (smtp:124.8.106.88) at Oct 5 07:41:11
Oct 5 07:44:37 myserver postfix/anvil[1882]: statistics: max connection count 1 for (smtp:124.8.106.88) at Oct 5 07:41:10
Oct 5 07:44:37 myserver postfix/anvil[1882]: statistics: max cache size 1 at Oct 5 07:41:10
Oct 5 08:54:16 myserver postfix/smtpd[3677]: connect from 118-161-48-181.dynamic.hinet.net[118.161.48.181]
Oct 5 08:54:20 myserver postfix/smtpd[3677]: NOQUEUE: reject: RCPT from 118-161-48-181.dynamic.hinet.net[118.161.48.181]: 554 5.7.1 <vjd39hww@yahoo.com.tw>: Relay access denied; from=<ttc585ttc585@yahoo.com.tw> to=<vjd39hww@yahoo.com.tw> proto=SMTP helo=<203.171.121.69>
Oct 5 08:54:21 myserver postfix/smtpd[3677]: lost connection after RCPT from 118-161-48-181.dynamic.hinet.net[118.161.48.181]
Oct 5 08:54:21 myserver postfix/smtpd[3677]: disconnect from 118-161-48-181.dynamic.hinet.net[118.161.48.181]
Oct 5 08:57:41 myserver postfix/anvil[3679]: statistics: max connection rate 1/60s for (smtp:118.161.48.181) at Oct 5 08:54:16
Oct 5 08:57:41 myserver postfix/anvil[3679]: statistics: max connection count 1 for (smtp:118.161.48.181) at Oct 5 08:54:16
Oct 5 08:57:41 myserver postfix/anvil[3679]: statistics: max cache size 1 at Oct 5 08:54:16
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