Hi,
I am currently trying to configure dual delivery with exchange and gmail and have run into an issue that won't allow me to send email from an exchange mailbox to an alias google sub domain.
I have successfully validated our primary domain with google and set up an alias sub domain (g.mydomain.co.uk) which receives email from other email addresses without issue however when I send an email from within our exchange organisation I get a #554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain ## error from our exchange server.
Anyone have any ideas what the issue might be? I have tried adding accepted domains and a send connector in exchange but it doesn't make any difference.
Thanks in advance