Configuring Sendmail to Listen on Multiple Specific IPs
As a novice sendmail user, finding information on this fix wasn’t easy. For a long time I was afraid to touch the sendmail.mc. If you aren’t familiar with it, and you plan to administer sendmail, I suggest taking a few minutes to go through the m4 README. It’s not nearly as confusing as I used to think it was.
Once you’ve got sendmail up with multiple IP addresses you may be interesting in the `CLIENT_OPTIONS’ setting. With it you can change the outbound IP address sendmail uses for sending email.
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