Dear All,
I have confused the meaning of filtering incoming and outgoing email option. Anyone can tell me that the incoming and outgoing email runs on the POP3/SMTP protocol level, regardless of the port number of POP3 and SMTP to use at client?

For example, the default pop3 and smtp number is 110 and 25. I changed these port number to 123 and 456 at client. Is it work for scanning incoming and outgoing email at client now?
Thanks & Regards,
Ken