We are upgrading our leg of a massive 5.5 mail network, the use x400 between servers and require SMTP mail flow to go back into their system their system.
Here we have a cluster with 3 Exchange enterprise 2003 servers and 2 Domain Controllers etc. we have remote offices that we want to install exchange standard into a server for them to have local, and to still administer them all from our current office.
Right now it would seem the smart host are preventing the proper mail flow within the 2003 environment. is there anyway to raise the natural interaction between servers above the priority of the SMTP connectors with Smart host ( Smart host are in the 5.5 area )
These are all the same domain and i want to keep then in the same domain and not segregate the outside locations within the WAN.
The only solutions that consultants have presented are to upgrade the location to enterprise, and that is not acceptable at the cost just to use x400.
Other solution that has been given is to make each location it's own domain and segregate the WAN, this is not acceptable for all the other services involved between sites and home office.
My answer is to simply place them all on the main servers and let the use the MPLS network to access mail, Higherup fear bandwidth issues. I need to have a conclusion by monday and some sort of evidence short of testing a scenario in the live network to prove or disprove current thinking on this project.
Thanks in advance for any advice.