posfix issue

[ç¿Œå]

hi all
i have an issue about postfix smtpd, i check the /var/log/message log, find:
Nov 2 17:19:01 ns7 postfix/smtpd[15831]: sql_sqlite3 plugin: no result found

i saw the revelant issue about this, they said, modify chroot in /etc/postfix/master.cf :
plesk_saslauthd unix y y y - 1 plesk_saslauthd status=5 listen=6 dbpath=/var/spool/postfix/plesk/passwd.db

after i modified the master.cf ,reloaded postfix system, but it had an error occured, postfix can not be started normally.so i recovered the master.cf.

do u have another way to fix the "sql_sqlite3 plugin: no result found" issue?
thanks so much.

 

[IgorG]

This message just indicates that someone tried authenticating with postfix but their details were not found. If you are get lots of these messages, then there is probably a spambot trying bruteforce email accounts so that it can send spam via your server.

 

[ç¿Œå]

thanks reply sir. so, how can i prevent this issue?

 

[IgorG]

Try to investigate /var/log/secure and deny access from this IP address by iptables.