Here's all you'll need to consider to allow IMAP traffic through:
IMAP TCP:143
IMAP (SSL) TCP:993
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Browse All Topicsimap4 configuration on Exchange 2003...
I need to support IMAP4 and have configured it for supporting some IMAP compatible PDAs.
Does this protocol require opening more that port 143 TCP on the firewall?
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by: murgroupPosted on 2007-09-14 at 12:42:10ID: 19894573
Yes you must port forward tcp\udp 143.