Both machines are on at the same time.

My next question is "How to avoid downloading 'collisions' that occur
when both machines are simultaneously attempting to receive email?"

Hmmm, that's different. In that case set both to not delete and once a day
(or some other interval) use another method to delete everything in the
mailbox (like a webmail interface)

wrote in message
oups.com...
Both machines are on at the same time.

My next question is "How to avoid downloading 'collisions' that occur
when both machines are simultaneously attempting to receive email?"

Here's a solution.

Open another email account at the server.

Copy all messages when received from account A to B.

Problem solved!