Thanks Michael.
I was able to get connected to my internet provider's (Comcast) smtp server this morning for my primary ISY. I have a 2nd ISY at a vacation home that will have to wait until I can get there and make the same changes locally. The ISY email function with substitution variables is extremely useful for creating a "cloud" based log of events such as temperature excursions, power failures, sump pump failures, Ring doorbell events, ELK alarm system events, etc. I typically get less than 25 emails a day from these 2 ISYs but in special cases it can exceed 100 which is the limit that Google allows on their free smtp server.
Best Regards
Mike