Danny,
Thank you for these suggestions!
For the first issue, if I am reading it right, there is no way to send it using authenticated user account, we simply must bounce it off the relay permitted to accept mail from checkpoint appliances.
For the second, changing the alert type will certainly do as a workaround if it works (I'll have to try it to verify). Deletion and recreation of the rule however, resets the hit count, which in some environments will be undesirable. If you have something like Tufin keeping track of hits based on the context, rather than UUID of the rule,it may work, not so much otherwise.
If you have any scripts for the transformation of the alerts into readable format, please share the wealth:)