Mail ports and other goodies

Standard mail ports

POP3 - port 110
IMAP - port 143
SMTP - port 25
HTTP - port 80
Secure SMTP (SSMTP) - port 465
Secure IMAP (IMAP4-SSL) - port 585
IMAP4 over SSL (IMAPS) - port 993
Secure POP3 (SSL-POP) - port 995

Forwarding mails in ISPConfig

To forward mail to another mail address without keeping copy on server, in custom rules enter:

redirect “destination_mail@forward.me”;
stop;

Extract emails in file 

grep -Eiorh '([[:alnum:]_.-]+@[[:alnum:]_.-]+?\.[[:alpha:].]{2,6})' “$@” * | sort | uniq > emails.txt