I've now put together a web page documenting this situation more extensively: Running a mail server on a dynamic address http://bcn.boulder.co.us/~neal/cablemail.html Comments, and hings on configuring other mailers, are welcome. Neal McBurnett http://bcn.boulder.co.us/~neal/ Signed and/or sealed mail encouraged. GPG/PGP Keyid: 2C9EBA60