Re: Activating Port 587 for relaying SMTP?

From: Gordon Fecyk (gordonf_at_pan-am.ca)
Date: 10/11/04 

Date: Mon, 11 Oct 2004 11:07:27 -0500

> Blocking outbound 25 on the server side would disable your mail server
from
> sending mail to any other mail server on the internet. The only way to
> circumvent this sort of filtering is to route all mail through your ISP's
> SMTP servers. Configure your ISP's SMTP server as a smart host.

You misinterpreted me. *MY SERVER'S* connection to the Internet is not
port-blocked. I am paying for business Internet service and from outside my
ISP's network I can connect to the machine just fine. The machine can also
connect to *other mail servers* outside of my ISP's network.

Some of my clients, who use this machine as a mail relay and mailbox server,
are on the ISP in question and cannot send mail through it on port 25.
There are other providers as well, who block port 25 outbound, who I have
clients on that can't use this machine for mail anymore.

And finally, there is the matter of using a sender verification protocol,
such as SPF or Sender ID, which requires anyone with an e-mail address in my
domain to use my mail system to send mail.

Politics aside, I have a technical problem that needs solving: How to open a
second port to relay SMTP mail through and to have that port secured through
SSL or TLS. The system must work with a variety of mail clients which
include non-Microsoft (Gasp!) clients. 

-- 
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GOD BLESS AMER, er, THE INTERNET. <http://vmyths.com/rant.cfm?id=401&page=4>

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