Exchange Envelope journaling creates a new message and attaches the journaled message to it. This 'carrier' message is a brand spanking new message, which nobody requested a read receipt on - therefore, Envelope Journaling should avoid this problem.
To establish whether you have Envelope Journaling operating correctly in your environment, take a look at the messages that are turning up in the archiver mailbox - You'll need to suspend the archiving task to do this, otherwise they'll disappear a bit quick.
If envelope journaling is working, you'll see mails with a single embedded message attachment and a body that contains the envelope recipients in a format similar to Internet mail headers.