[Macpartners] OS X Mail — Cannot send message using the server MIT (Exchange)

[John-Elmer Canfield]

Every once in a while I get this alert when sending mail:




When I click on "Try With Selected Server", sometimes the dialog reappears, but after clicking it again, the mail will ultimately go through.  

On one occasion, the recipient told me they received multiple copies of my message, but I don't know if that happens every time this occurs.

I've had this happen on two different Macs, both on campus and off campus. It's certainly not a crippling problem, but I'd like to make it stop. Has this happened to anyone else, and is there a solution?

Thanks,

Elmer
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