Yesterday I added an SPF record to DNS. I hope that this fixes the problem of not being able to send email to gmail. But it won't be clear until it is tested.
Google mail bouncing - due to changes from Google, we currently are not able to send any email announcements to anyone using a Google email address. There is a fix, but I don't have time at the moment to research it. The work-around for the moment is to log in to your account and RSVP directly if you have a meeting. Sorry for the inconvenience.
I have made a purge of the member list for those who have not been involved since 2018-05-25. Members not involved since 2022-01-01 who have no WordPress account have now been set to inactive and will eventually be removed as well.