I have a problem with an account wich handles it's email on a remote exchange server. E-mail works, but not when another account on the same server sends an email to this account or when an email is send via an online form on the website itself.

In the DNS zone of the domain I added the following lines:
domain.com. 14400 IN MX 0 mail.domain.com.
mail.domain.com. 14400 IN A 12.34.56.78

The e-mail should be handled by the Exchange Server I'm pointing to, but instead I get the message "no such user here" from my own server.

I allready checked if the domain was in remotedomains and localdomains.

I hope my story is clear for everybody. If not please ask me to be more precise. It would be great if I can sort this out real soon.

Thanks in advance!