Hello,
I have a Custom Address route set up to forward emails from one email address to another, both on the same domain.
When I send to the address to be forwarded, I am getting bounce errors like this:
The response from the remote server was:
521 5.3.0 Upstream error, please check for possible reasons why. pRhrLCl8HYb6
In the CF Email Routing Summary, I’m seeing this:
SPF status
pass
DMARC status
pass
DKIM status
pass
Rejected reason:
upstream (.) error: failed to initalize: Unknown error: permanent error (550): 5.1.1 Address does not exist. LLmeRiawaJpq
What’s odd is that I’ve tested sending to this email address from three different domains. Two failed (bounced) and one worked perfectly.
Any thoughts or suggestions?
Thank you.