I am presently chaining our mail domain from website.com to city.website.on.ca. There are two mx records.The fully qualified host name is mail.website.com and the mail works fine. The new domain that the mail is sent to is mail.city.website.on.ca When I send mail to name@city.website.on.ca it is returned with the following error, 554 relay rejected for policy reasons. I can change the fully qualified name to mail.city.website.on.ca and the mail will be delivered but not to the original name.
Is there away to deliver to both?
Thanks for your time.