Code: un 26 07:40:02 server1 postfix/sendmail[13385]: fatal: bad string length 0 < 1: myhostname = Jun 26 07:41:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 07:45:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:45:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:45:01 server1 postfix/sendmail[13518]: fatal: bad string length 0 < 1: myhostname = Jun 26 07:50:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:50:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:50:01 server1 postfix/sendmail[13652]: fatal: bad string length 0 < 1: myhostname = Jun 26 07:51:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 07:55:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:55:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:55:01 server1 postfix/sendmail[13784]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:00:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:00:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:00:01 server1 postfix/sendmail[13921]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:01:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:05:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:05:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:05:01 server1 postfix/sendmail[14088]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:10:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:10:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:10:01 server1 postfix/sendmail[14222]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:11:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:15:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:15:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:15:01 server1 postfix/sendmail[14355]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:20:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:20:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:20:01 server1 postfix/sendmail[14489]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:21:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:25:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:25:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:25:02 server1 postfix/sendmail[14622]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:30:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:30:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:30:02 server1 postfix/sendmail[14757]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:31:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:35:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:35:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:35:01 server1 postfix/sendmail[14889]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:40:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:40:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:40:01 server1 postfix/sendmail[15023]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:41:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:45:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:45:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:45:01 server1 postfix/sendmail[15156]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:50:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:50:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:50:01 server1 postfix/sendmail[15290]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:51:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:55:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:55:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:55:01 server1 postfix/sendmail[15422]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:00:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:00:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:00:02 server1 postfix/sendmail[15559]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:01:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:05:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:05:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:05:01 server1 postfix/sendmail[15726]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:10:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:10:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:10:01 server1 postfix/sendmail[15860]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:11:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:15:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:15:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:15:02 server1 postfix/sendmail[15993]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:20:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:20:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:20:01 server1 postfix/sendmail[16127]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:21:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:25:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:25:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:25:01 server1 postfix/sendmail[16259]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:30:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:30:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:30:01 server1 postfix/sendmail[16395]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:31:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:35:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:35:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:35:01 server1 postfix/sendmail[16527]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:40:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:40:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:40:01 server1 postfix/sendmail[16661]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:41:38 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:45:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:45:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:45:01 server1 postfix/sendmail[16794]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:50:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:50:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:50:01 server1 postfix/sendmail[16928]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:51:38 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:55:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:55:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:55:02 server1 postfix/sendmail[17060]: fatal: bad string length 0 < 1: myhostname = Jun 26 10:00:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 10:00:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 10:00:01 server1 postfix/sendmail[17195]: fatal: bad string length 0 < 1: myhostname = Jun 26 10:01:38 server1 clamd[1584]: SelfCheck: Database status OK.
un 26 07:40:02 server1 postfix/sendmail[13385]: fatal: bad string length 0 < 1: myhostname = Jun 26 07:41:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 07:45:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:45:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:45:01 server1 postfix/sendmail[13518]: fatal: bad string length 0 < 1: myhostname = Jun 26 07:50:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:50:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:50:01 server1 postfix/sendmail[13652]: fatal: bad string length 0 < 1: myhostname = Jun 26 07:51:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 07:55:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:55:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 07:55:01 server1 postfix/sendmail[13784]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:00:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:00:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:00:01 server1 postfix/sendmail[13921]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:01:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:05:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:05:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:05:01 server1 postfix/sendmail[14088]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:10:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:10:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:10:01 server1 postfix/sendmail[14222]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:11:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:15:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:15:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:15:01 server1 postfix/sendmail[14355]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:20:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:20:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:20:01 server1 postfix/sendmail[14489]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:21:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:25:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:25:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:25:02 server1 postfix/sendmail[14622]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:30:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:30:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:30:02 server1 postfix/sendmail[14757]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:31:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:35:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:35:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:35:01 server1 postfix/sendmail[14889]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:40:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:40:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:40:01 server1 postfix/sendmail[15023]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:41:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:45:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:45:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:45:01 server1 postfix/sendmail[15156]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:50:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:50:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:50:01 server1 postfix/sendmail[15290]: fatal: bad string length 0 < 1: myhostname = Jun 26 08:51:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 08:55:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:55:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 08:55:01 server1 postfix/sendmail[15422]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:00:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:00:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:00:02 server1 postfix/sendmail[15559]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:01:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:05:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:05:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:05:01 server1 postfix/sendmail[15726]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:10:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:10:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:10:01 server1 postfix/sendmail[15860]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:11:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:15:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:15:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:15:02 server1 postfix/sendmail[15993]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:20:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:20:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:20:01 server1 postfix/sendmail[16127]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:21:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:25:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:25:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:25:01 server1 postfix/sendmail[16259]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:30:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:30:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:30:01 server1 postfix/sendmail[16395]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:31:37 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:35:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:35:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:35:01 server1 postfix/sendmail[16527]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:40:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:40:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:40:01 server1 postfix/sendmail[16661]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:41:38 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:45:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:45:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:45:01 server1 postfix/sendmail[16794]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:50:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:50:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:50:01 server1 postfix/sendmail[16928]: fatal: bad string length 0 < 1: myhostname = Jun 26 09:51:38 server1 clamd[1584]: SelfCheck: Database status OK. Jun 26 09:55:02 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:55:02 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 09:55:02 server1 postfix/sendmail[17060]: fatal: bad string length 0 < 1: myhostname = Jun 26 10:00:01 server1 dovecot: imap-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 10:00:01 server1 dovecot: pop3-login: Disconnected (no auth attempts): rip=::1, lip=::1, secured Jun 26 10:00:01 server1 postfix/sendmail[17195]: fatal: bad string length 0 < 1: myhostname = Jun 26 10:01:38 server1 clamd[1584]: SelfCheck: Database status OK.
Odd i followed the Perfect Server - CentOS 6.5 x86_64 (Apache2, MySQL, PHP, PureFTPD, Postfix, Dovecot, ISPConfig 3) word for word, also checked main config file it has hostname there checked spelling and it's right?.
The installation guide does not contain an error, but your main.cf has an error according to the log file. Please post the main.cf file.
I uninstalled postfix and reinstalled it is working now odd. Also i noticed that ftp config file kept reverting to original version after changing TLS sessions, set TLS to 1: would revert back to zero after ispconfig3 installation. Everything is working fine seems to be centos doing strange stuff.