How do I block emails from being received in Roundcube from sender not within the intranet setup? We have a membership site and want only members to be able to send emails to each other and not spammed.
For example if the domain is Happy Harry's Pharmacy | Walgreens (http://www.happy.com) and 2 emails (
[email protected] and
[email protected]) exist. If my email is
[email protected] and I send emails to either or both happy.com emails, it should be blocked, not received by either email.
Thanks for your attention.
Sheba