Have you ever had the problem where a 3rd party ISP is redistributing messages it should be leaving alone?
Here's the problem:
A user sends a message to about 100 recipients. Some are local to Exchange, some are on the Internet.
One of the Internet ISP's (which shall remain nameless for now) picks up the message and not only delivers the copy to it's local subscriber but ends up sending the message back to our Exchange server and thus, duplicating the message. The local recipients (as well as the other Internet recipients) end up getting two copies of a message that was only sent once.
How can we stop this ISP from doing this? I've never heard of this before and don't know where to tell them to start looking in their configuration to fix the problem.
Thanks!
Here's the problem:
A user sends a message to about 100 recipients. Some are local to Exchange, some are on the Internet.
One of the Internet ISP's (which shall remain nameless for now) picks up the message and not only delivers the copy to it's local subscriber but ends up sending the message back to our Exchange server and thus, duplicating the message. The local recipients (as well as the other Internet recipients) end up getting two copies of a message that was only sent once.
How can we stop this ISP from doing this? I've never heard of this before and don't know where to tell them to start looking in their configuration to fix the problem.
Thanks!
