From owner-freebsd-questions@FreeBSD.ORG  Wed May 19 21:07:42 2004
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From: Jay Moore <jaymo@cromagnon.cullmail.com>
To: freebsd-questions@freebsd.org, fbsd_user@a1poweruser.com
Date: Wed, 19 May 2004 23:10:42 -0500
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cc: "freebsd-questions@FreeBSD. ORG" <freebsd-questions@freebsd.org>
Subject: Re: how-to tell sendmail to mail thru my ISP
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On Wednesday 19 May 2004 11:02 am, fbsd_user wrote:
> I have dynamic IP address and ISP blocks inbound port 25 so any
> recipients email server that checks back before accepting says I an
> invalid sender. Going through my ISP email server should fix this.
>
> How do I tell sendmail to send, relay my outgoing email through
> my ISP email server?

see the SMART_HOST feature in sendmail.

hth,
Jay