This question is probably better suited to a sendmail list, but I will tell you what's in the O'Reilly sendmail book I recently bought (1100+ pages). Just add: define( `SMART_HOST', `gateway.your.domain') You would think that a book containing over 1100 pages would have more on this subject than a paragraph. It is a technical book though, so it may group this function into basic configuration, which it doesn't cover. It does refer one to the README file in /usr/share/sendmail/conf which has some more stuff on the SMART_HOST config option. On Monday, April 21, 2003, at 01:52 PM, Chris Vervais wrote: > Anyone here care to enlighten me on how to setup sendmail to relay > through a smarthost? > -- Brent Baisley Systems Architect Landover Associates, Inc. Search & Advisory Services for Advanced Technology Environments p: 212.759.6400/800.759.0577