Quote:
Originally Posted by greencreeper
Hotmail down for more than 4 days?  By the time I got the above email we had already chatted on MSN 
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When I was postmaster for the last company I worked for I always had problems delivering mail to hotmail. An outgoing server will only try a certain number of times, and if the receiving server is unable to accept the message for all of them, that error is produced. The problem I had was that hotmail was so busy dealing with other requests that it didn't have the resources to accept the messages we were sending. Of course, sensible outgoing servers will batch together messages to be sent to the same server, so someone else's message that hasn't got through can cause yours to fail too (because the outgoing server knows that the receiving server is failing). It was a matter of statistics - a certain number of senders would get through before timing out, and the rest wouldn't.