Possible solutions of your questions

Hello

access granted

the reason for блокировкb ip

csf.deny: 217.113.120.32 # lfd: (pop3d) Failed POP3 login from 217.113.120.32 (RU/Russian Federation/zz217.113.120-32.tlt.ru): 50 in the last 3600 secs - Mon Sep 14 09:03:03 2015
incorrect configuration of the mail client that was seen by the firewall as an attempt to break the box.

please check bitters

2015-09-14 08:12:59 SMTP connection from [217.113.120.32]:49172 (TCP/IP connection count = 1)
2015-09-14 08:12:59 no IP address found for host zz217.113.120-32.tlt.ru (during SMTP connection from [217.113.120.32]:49172)
2015-09-14 08:13:01 dovecot_login authenticator failed for (opttel3-pc) [217.113.120.32]:49172: 535 Incorrect authentication data ([email protected])
2015-09-14 08:13:01 SMTP connection from (opttel3-pc) [217.113.120.32]:49172 closed by QUIT
2015-09-14 08:22:59 SMTP connection from [217.113.120.32]:49225 (TCP/IP connection count = 1)
2015-09-14 08:22:59 no IP address found for host zz217.113.120-32.tlt.ru (during SMTP connection from [217.113.120.32]:49225)
2015-09-14 08:23:01 dovecot_login authenticator failed for (opttel3-pc) [217.113.120.32]:49225: 535 Incorrect authentication data ([email protected])
2015-09-14 08:23:01 SMTP connection from (opttel3-pc) [217.113.120.32]:49225 closed by QUIT
2015-09-14 08:32:59 SMTP connection from [217.113.120.32]:49237 (TCP/IP connection count = 1)
2015-09-14 08:32:59 no IP address found for host zz217.113.120-32.tlt.ru (during SMTP connection from [217.113.120.32]:49237)
2015-09-14 08:33:05 dovecot_login authenticator failed for (opttel3-pc) [217.113.120.32]:49237: 535 Incorrect authentication data ([email protected])
2015-09-14 08:33:05 SMTP connection from (opttel3-pc) [217.113.120.32]:49237 closed by QUIT
2015-09-14 08:42:59 SMTP connection from [217.113.120.32]:49247 (TCP/IP connection count = 1)
2015-09-14 08:42:59 no IP address found for host zz217.113.120-32.tlt.ru (during SMTP connection from [217.113.120.32]:49247)
2015-09-14 08:43:01 dovecot_login authenticator failed for (opttel3-pc) [217.113.120.32]:49247: 535 Incorrect authentication data ([email protected])
2015-09-14 08:43:01 SMTP connection from (opttel3-pc) [217.113.120.32]:49247 closed by QUIT
2015-09-14 08:52:59 SMTP connection from [217.113.120.32]:49258 (TCP/IP connection count = 5)
2015-09-14 08:52:59 no IP address found for host zz217.113.120-32.tlt.ru (during SMTP connection from [217.113.120.32]:49258)
2015-09-14 08:53:01 dovecot_login authenticator failed for (opttel3-pc) [217.113.120.32]:49258: 535 Incorrect authentication data ([email protected])
2015-09-14 08:53:01 SMTP connection from (opttel3-pc) [217.113.120.32]:49258 closed by QUIT
2015-09-14 09:02:59 SMTP connection from [217.113.120.32]:49265 (TCP/IP connection count = 2)
2015-09-14 09:02:59 no IP address found for host zz217.113.120-32.tlt.ru (during SMTP connection from [217.113.120.32]:49265)
2015-09-14 09:03:01 dovecot_login authenticator failed for (opttel3-pc) [217.113.120.32]:49265: 535 Incorrect authentication data ([email protected])
2015-09-14 09:03:01 SMTP connection from (opttel3-pc) [217.113.120.32]:49265 closed by QUIT
2015-09-14 09:03:03 1ZbMr1-002Xkk-LK <= [email protected] U=root P=local S=10634 T=\"lfd on tisza.hostven02.ru: blocked 217.113.120.32 (RU/Russian Federation/zz217.113.120-32.tlt.EN)\"