When I try to use port 587 (SSL) I get an error that my SMTP is not
responding. I checked that submission is running and that port 587 is
open. Where else should I check to troubleshoot this problem?
Thanks,
Scott
On 5/31/10 4:12 PM, Eric Shubert wrote:
If you're having problems with blacklists, TLS/SSL won't fix that. In
order to get around submitters being blacklisted, you have to either
configure the client(s) to use port 587 (the submission port) instead
of port 25, or install spamdyke on your QMT, which bypasses filters
(including rbl checks) for authenticated sessions on port 25.
Regarding Outlook specifically, it should be noted that Outlook'03
does not support TLS, and can only use SMTPS (the deprecated port
465). Outlook'07 does support TLS however, and should be configured to
use this on the standard port 587.
HTH.
