@raytan12 Thanks very much for the ‘automatic email testing’ plugin suggestion. Great tip
I’ve done a bit of searching and it seems Google no longer likes the built in wordpress php email module. So I installed the WP Mail SMTP plugin, configured it per the (comprehensive) instructions and it works, the contact form messages are being delivered again.
https://en-gb.wordpress.org/plugins/wp-mail-smtp/
https://wordpress.org/support/topic/i-dont-receive-any-email-but-i-get-a-succesfull-message-response/
We use gmail/google apps for our email so I suspect I am having the same problem as in the thread above.
Hello, I have the same problem, the contact from (which has been working for many years) has stopped working. The contact form goes green but the message is not received. I checked the email address and it is functioning normally. thank you