On May 16, 2008, at 9:30 PM, James G. Sack (jim) wrote:
I wonder what the general stats are on availability of 587.
Also I suppose the intention of 25/587 use would explain why ISPs
might
filter outgoing port 25 -- otherwise, I would wonder why ISPs filter
anything outgoing anyway?
I've found that 587 is generally not blocked. Port 587 is considered
the "Submission" port, to be used only for end-user mail clients to do
the initial mail submission to the MTA infrastructure. Ports 25 and
465 are for use for MTA-MTA traffic between mail exchangers, and are
generally the ones filtered to prevent spam.
Gregory
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Gregory K. Ruiz-Ade <[EMAIL PROTECTED]>
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