Re: wireless lan

[Gordon Messmer <yinyang eburg com>]

On Fri, 31 Aug 2001, Cameron Simpson wrote:

> BTW, anyone know if there's a variant on an MX record to say "deliver
> using SSL"?

No, but there's no reason for one, either.  If your MX supports SSL, then
it should advertise the STARTTLS extension.  If the remote mailer supports
TLS, then it should use it.

If you're interested in support for this kind of thing, I highly recommend
the Courier MTA (www.courier-mta.org).  Courier supports TLS and SSL on
all of its protocols, as well as several security extensions in the SMTP
protocol for guaranteed secure delivery.  You can even configure the
server to require TLS when sending mail to specified domains.

Beware, however, that Courier (correctly) regards the advertisement of TLS
by remote servers as a request for secure communications.  Exchange
servers *always* advertise TLS, although they are almost never configured
for it.  So, Courier connects, Exchange says "I support TLS", Courier
tries to start TLS, and Exchange fails.  So, unless you turn off TLS, no
mail to Exchange servers.

-- 
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