Hi, First post - hope I dropped it in the right place OK, we're using Sendmail on RHAS 4 and all of the mail up till now has been local / internal only; this has negated the need to pass it through our spam filter/mail gateway etc. We now need to route some mail to external domains, which means it must go through the filter; similarly all messages originating from localhost address should continue to use the current configuration. So, my question is this..... Can we configure Sendmail to send mail that originates from a particular address out via a specific smarthost/relay? The from address would be formatted as a valid internet mail address (e.g. email@example.com). If (and I really hope the answer is yes) this is possible, what is the best/easiest/safest/quickest way of achieving this? I'm not very familiar with sendmail.cf syntax etc., so answers in "configuring sendmail for dummies" format would be greatly appreciated!! Thanks in advance for any help, Mark.