This tutorial will guide you to pull mails from external mail accounts (via POP3 or IMAP) on new zimbra server.
First of all you have disable “starttls” login in webmail.
#su zimbra
#zmlocalconfig -e javamail_imap_enable_starttls=false
#zmlocalconfig -e javamail_pop3_enable_starttls=false
#zmmailboxdctl restart
#zmlocalconfig -e javamail_imap_enable_starttls=false
#zmlocalconfig -e javamail_pop3_enable_starttls=false
#zmmailboxdctl restart
logged into webmail by using mail id and passowrd
prefrences >> mail >> add accouunt
