I have set up a sub-domain (sub.ourdomain.net) and I am trialling Google Apps on it (with 1 account so far).
I have had a forwarding account set up on my Exchange mailbox (@domain.net) to this trial account (@sub.domain.net).
I can send from both accounts but the forwarding does not seem to be working at all. More bizarrely, any external email (i.e. outside either domain) sent to my Exchange account results in some odd behaviour:
1) I receive the email at my Exchange account
2) It is not forwarded onto my subdomain account
3) The external sender also receives a message "550 5.7.1 unable to relay for firstname.lastname@example.org"
Is this related to the fact it is a subdomain account and Exchange is getting all upset?
Hear from you soon