From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Thu Sep 20 2007 - 15:27:26 CDT

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On Thu, Sep 20, 2007 at 10:22:57PM +0200, Frank Gruellich wrote:

> To provide our mail service to these networks we thought about doing
> some ugly VPN tricks, we thought about more ugly web mailers... but I
> would like the much simpler way to accept SMTP via SSL at 465 in the
> hope, that neither open servers nor infected boxes offer encrypted spam
> relay.

465 is the obsolete SSL wrapper mode supported by older Outlook clients.
The standard submission service is port 587 with STARTTLS.

> So what's your experience, is this a port that is treated same
> as port 25 or is there in general a better chance for this?

Use 587, but offer 465 to ancient clients can't to STARTTLS on 587.

--
        Viktor.

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