Question : Securing Exchange with another companies Exchange server

Hello,

I am looking for the best way to secure our Exchange 2003 Server with another companies Exchange Server. VPN is out because of our off site archiving solution. Thanks!

Answer : Securing Exchange with another companies Exchange server

you can setup SMTP/TLS at your and their end:
http://www.networkworld.com/news/2007/011807-tls4.html
http://support.microsoft.com/kb/829721

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