Sendmail Smart_Host Configuration

To: NetBSD netbsd-help mailing list <netbsd-help@netbsd.org>
Date: 03/24/2004

> How do I configure a Smart Host in Sendmail ? (that means that all outgoing
> emails are going to another mailserver)

You can configure a smart host by changing the 'DS' entry in sendmail.cf. My smart host is called orthanc, so my /etc/mail/sendmail.cf contains the line:

DSorthanc

However, it's probably better to generate the sendmail.cf from an mc file in /usr/share/sendmail/cf:

copy the netbsd-proto.mc file:

cp netbsd-proto.mc mydomain.mc

add the smart host line:

define(`SMART_HOST', mysmarthost)dnl

build the cf file with:

make mydomain.cf

backup original cf:

mv /etc/mail/sendmail.cf /etc/mail/sendmail.cf.dist

copy new cf:

mv mydomain.cf /etc/mail/sendmail.cf.dist

restart sendmail:

/etc/rc.d/sendmail restart

Julian Coleman @coris.org.uk

documented on: 2007.12.21