Redirecting to external email address gives a loop error
I’m trying to setup forwarding of emails to external accounts, but I can’t get this to work.
I am using my custom domain (let's call it mycustomdomain.com) for my Mailbox.org account, and both the mail email address and aliases are working fine.
But I also want to redirect some other email addresses on mycustomdomain.com to other external email addresses. I have set up forwarding by going to Settings -> Email -> Filter rules. Here I have added a new rule which says:
- Conditions: Any recipient contains email@example.com
- Actions: Redirect to firstname.lastname@example.org
- (Don’t process subsequent rules)
However, if I send an email to email@example.com it bounces with the error:
<firstname.lastname@example.org>: mail for mycustomdomain.com loops back to myself
There aren't any rules at gmail.com which forwards emails back. And if I check the email source/headers of the bounced mail, it doesn't seem like it ever tries to actually send the email to the gmail.com-account.
I can’t understand why this is happening. Any ideas?