Odd Mail problem, possible dns issue
I have a strange problem with my setup. I have followed the perfect server cent os tutorial (http://www.howtoforge.com/perfect-se...ispconfig-3-p5) and the server is running great. I have a domain who has an external microsoft exchange server dealing with their email Let's call them Client 1. Email is working great in all aspects except one. When a user from another domain (client 2) sends mail to the client that uses exchange(client 1) they recieve an error of .
Client 2 email to outside = fine
client 1 email to outside = fine
client 2 email to client 1 = Error
Any help would be appreciated.
Looks like a DNS configuration error.
Ask your Exchange client admin to check out what IP address their mail domain gives them?
It probably points to a local IP address. Read about Split DNS.
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