We are looking for a rule set that will automatically whitelist the recipient's email address when the email is sent.
Do you have any idea how to solve it?
Note: I wonder if this is a good thing? If a client is infected and sends out tens, hundreds or even thousands of emails, all of them will be whitelisted.
no that's not possible with the rule system currently, but I also don't think that's a good idea
just because you send an e-mail to somebody, doesn't mean they won't send you spam back