Experiencing emails being bounced from Exch 2010, not recognising email address. The following is the configuration:
- Exchange 2010 on 2008 Svr R2 64bit, also acting as HUB Transport.
- DC is 2008 R2 (AD) - local network domain is bordnagaidhlig.local.
- Email relayed from 3rd party using gaidhlig.org.uk as domain name.
This configuration is a new build with no migration from 2003 SBS.
We have changed domain hosting and prior to changeover all worked fine. However MX records were deleted by previous host prior to new host accepting domain change.
Hub Transport (Server) is set to 2 receive connectors (194.105.xxx.x/25 and 194.105.xxx.x/25) with default authentication. ISP can telnet to Exchange server Port 25 but mail throughput is bounced as email address not recognised.
Hub Transport (Client) is using smarthost - mailhost.xxx.co.uk, however we cannot telnet to host Port 25 and subsequently all traffic is being qued at Exch.
Port 25 has been configured for SMTP.
any help with this would be appreciated as it is now critical to business.