Filezilla ssh gateway11/14/2022 ![]() So yet another port ( 587) was defined for message submission. However, SMTP was originally designed for transfer, not submission. #Filezilla ssh gateway softwareMost email software used SMTP on port 25 to submit messages to the email server for onward transmission to the destination. However that's for a different reason again. The one real exception to the above is SMTP. By disabling ports 143 and 110, this removes completely STARTTLS as even an option for IMAP/POP connections. Many sites (including FastMail) now disable plain IMAP (port 143) and plain POP (port 110) altogether so people must use an SSL/TLS encrypted connection. ![]() IMAP SSL/TLS encrypted over port 993 or POP SSL/TLS encrypted over port 995. This has now basically become the de facto standard that everyone uses. #Filezilla ssh gateway upgrade
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