To help increase the chances of your emails being delivered and not being stopped due to anti-spoofing, it is possible to send out email messages from Moodle/Totara using a no-reply address.
The setting can be found under Site administration > Plugins > Message outputs > email.
The default email address to use as the "From" address where users cannot reply directly to others (eg when a user chooses to keep their address private) can be configured here.
Checking the box to enable 'Always send email from the no-reply address,' is recommended to help stop anti-spoofing.
For more steps on email see:
- Setting Up a SPF for Lambda to Send Email on Behalf of Your Email Domain
- Avoid Getting on Email Blacklists