I only want sendmail to relay through my ISP's smtp server, nothing else. How do i set it up?
You have specified answer in the question itself. You can do that using
Are you facing any problem using this. After editing
/etc/mail/sendmail.mc you should go to directory
make and then restart
sendmail service for changes to take effect. Then send a test mail and see message headers (Received:) to see if configuration worked.
If you aren't doing anything more fancy with the cumbersome beast that is Sendmail then you could consider using SSMTP instead.
It's a relay-only MTA which is lightweight and couldn't be simpler to configure.
Do yourself a huge favour and replace sendmail with either a modern mta like postfix or something more lightweight like ssmtp. I'm amzed that sendmail is still used voluntarily
Nullmailer, IMHO, is even easier to configure. Here is a quick howto:
apt-get install -y nullmailer
Edit this file:
- Enter your domain name, like mydomain.com
Edit another file:
- Enter your smtp server data:
[mysmtpserver.com] smtp --auth-login --user=[username] --pass=[password]