Squid has nothing to do with SMTP or POP or IMAP etc. squid works on different ports (look at http_port in squid.conf). Check your firewall settings to allow port 25/110 for email. Or check postfix etc. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/How-to-authorize-SMTP-and-POP3-on-SQUID-tp4665342p4665343.html Sent from the Squid - Users mailing list archive at Nabble.com.