After wasting time calling your web host, and going through various troubleshooting techniques, they tell you to call Comcast. If you are using for your SMTP outgoing mail server, then you get an error saying “unable to connect to the mail server” even though it just successfully connected to the mail server to retrieve your incoming mail. Account: ‘XXXX’, Server: ‘’, Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 10060, Error Number: 0x800CCC0E The error message says (fill in your own X): Users all over the country are finding out daily that suddenly, for no apparent reason at all, they are unable to send mail if they want people to reply to their business or personal e-mail addressed other than one that is This is because Comcast is blocking port 25, which is your default port for sending email through your mail software. This industry changes FAST, so blindly following the advice here *may not* be a good idea! If you're at all unsure, feel free to hit me up on Twitter and ask. I post at now, and this post was published 14 years 9 months ago.
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