Hi,

Found from maillog & zimbra.log in mailbox server & mta server

Jun 29 09:11:02 smtp postfix/smtpd[5181]: SSL_accept error from unknown[10.10.18.90]: -1
Jun 29 09:12:23 smtp postfix/smtpd[20398]: SSL_accept error from unknown[10.10.18.90]: -1
Jun 29 10:19:21 smtp postfix/smtpd[7731]: SSL_accept error from unknown[10.10.18.90]: -1
Jun 29 10:20:10 smtp postfix/smtpd[20398]: SSL_accept error from unknown[10.10.18.90]: -1

What is that mean? Just want to know more info. Tq