Setting up a New SBS 2011 Server and Having email issues

[MightyEgor]

I setup a brand new server with SBS 2011 & exchange 2010 because the old SBS 2003 with exchange 2003 close to death. Both servers are on different domains. I transferred all the emails from old server via outlook 2010 and put on new server through the same outlook once the accounts were created. Now I am having major issues sending emails through the local domain and keep getting this message

 

IMCEAEX-_O=old domain _OU=FIRST+20ADMINISTRATIVE+20GROUP_CN=RECIPIENTS_CN=useremail

#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

 

They bounce in outlook and OWA. Is there anyway to update the senders info on the old emails from the old domain or how can I fix this.

 

I tried adding a new authoritative domain for the old domain, but it was unsuccessful or I did not do correctly. Have not used SBS 2011 or Exchange much in past.

[Shocker]

can I just ask are you sending these through by using the global address list or selecting the names from the autocomplete function?

 

I found it best to delete from the autocomplete function and rebuild this autocomplete list again by using the global address list.

[MightyEgor]

If you reply to any of the received emails of last week and further in the past they bounce internally for us, but am not sure if customers are having same difficulty. Most people are just typing them in and then it switches to the persons name. I have been having every one use the global address list. I thought I had deleted every ones autocomplete when I made the new user accounts for people, because of the domain name change. I am hoping that if everyone uses the GAL for awhile it will correct itself, but not sure if it will work that way. Any suggestions? Edited October 22, 2013 by MightyEgor