PMDF System Manager's Guide

PMDF normally rewrites addresses as it enqueues messages to its channel queues. No additional rewriting is done during message dequeue. This presents a potential problem when host names change while there are messages in the channel queues still addressed to the old name.

The connectalias keyword tells PMDF to simply deliver to whatever host is listed in the recipient address. This is the default. connectcanonical forces PMDF to run the address through the rewrite rules one additional time and use the host that results.

connectcanonical should only be used specifically to deal with problems with queued messages---it may have unintended effects on other message traffic. In particular, connectcanonical must not be used on bit_ channels.