Re: Changed ISP\'s, now can\'t send/receive e-mail w/Outlook
Comcast is blocking your port 25 to any SMTP servers except their own. You can either change your Exchange server to listen on an alternate/additional port (587 is common), or use their SMTP server (smtp.comcast.net) to send mail.
Large ISPs do this as a preventative measure against comprimised computers sending out large amounts of spam.
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