I have an Exchange 2003 server on a domain and people have their email using the domain name ie 'firstname.lastname@example.org' for example but some need to send emails using the FROM option placing a different domain in the FROM field eg. 'email@example.com'. However the 'replydomain' is held by another company and I am getting the error
The following recipient(s) could not be reached:
firstname.lastname@example.org on 29/11/2007 00:06
You do not have permission to send to this recipient. For assistance, contact your system administrator.
Some people need to send using an email address and domain which is not the default domain, is this relaying and will it open up all sorts of problems or is there a way round it.