Hi Duncan, as promised, here is my fix. First of all, my problem had nothing to do with the ISP - I knew that, but so many people told me it was the ISP's DNS that had to be the culprit - not so.
If you go into your Internet Mail properties (under connections) and go to the "address...
Hi Duncan, wish I had the answer - I have just started having this error also. Having migrated servers last week I have had a number of problems with connectivity (exchange is behind proxy) but I have finally got it going except for one thing - the recipient not known issue. I also had an...
Until recently I had a single doman running proxy and exchange on PDC - worked great. Have now added 3 new servers, and a domain. I used MS migration tool to migrate from old server to new. Exchange is now running on BDC in new Domain A and is connecting with ISP through Proxy running on PDC...
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