Split Sendmail Config

[Jonathan Allen]

Hi All,

Can anyone point me to a solution for a little problem I have ?

I send out newsletters a few times a month for some church organisations
I work with - all fully opt-in, don't worry :-)  Our mailhost does all
its own outgoing SMTP work, so there is no smart-host defined in the
sendmail.mc file.  However, some ISPs - charter.net in particular - won't
accept mail directly from our mailhost and so I have to keep on switching
over to use out ISPs smarthost to deliver those dozen or so emails.

Can I (easily) tell sendmail to deliver *@charter.net through our ISP's
smarthost, while handling all the rest of our outgoing SMTP stream
directly as we currently do ?

Jonathan