We have two sites, one had CF7 installed on it.
Site 1: Site with CF7, now submissions not being received
Site 2: Recently moved hosts.
The only correlation between the two sites I can see is that submissions from Site 1 had the sender email address of an account on Site 2.
I see no other connection, and changing the send from email address to anything else makes no difference. The email accounts all still exist, and no changes were made to Site 1.
So, where do I look?