I want to add a few more details to Wayne’s post on how to add the mrtennis.org emails to your contact list.
There are two senders of emails going out from mrtennis.org:
firstname.lastname@example.org Name MRTC Webmaster
Used by Website messages, Warnings and software updates from wordfence
email@example.com Name: Mesa Regal Tennis Club
Used by Postings
Please add both senders to your cotacts.
Another option to avoid that those emails continue to go to Spam is to find those emails in your Spam folder and mark them as Not Spam.
I hope this helps. Please contact us with any questions