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