On Fri, Mar 11, 2005 at 08:51:03PM +0100, Brad Knowles <brad at stop.mail-abuse.org> wrote a message of 35 lines which said: > DNS has nothing to do with ports. ... > Not via DNS, no. I disagree. SRV (RFC 2782) are a DNS solution and the right one for the OP. Unfortunately, they are not widely implemented in client software (here, Web browsers).