I'm maintaining a server that configured using Sendmail to send
outbound mail to the Internet via a Smart Host, eg.
# "Smart" relay host (may be null)
DS<mailhost of ISP>
The ISP says that because we are hosting our own mailserver, we cannot
use their mailhost this way (eg. it's probably only for mail clients,
smaller usage etc)
I understand that sendmail can be configured to just use itself
locally to send mail - happy days, but people have told me that it
might open up a can worms such as configuring SPF records etc.
I would rather make as few changes as possible so as not to disrupt
the existing mail sending functions. Has anyone configured sendmail
like this and is simple or complex, any good pointers to guides etc?
I know some of you might say "Dude, use Postfix|Exim" but I want the
changes to be as minimal as possible.
Thanks!
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