There was an error trying to send your message. Please try again later.

Been using this plugin for years and I also use it on two other sites. A friend told me she can’t contact me. So I tried and I’m getting the orange error “There was an error trying to send your message. Please try again later.”. The other two sites work fine. I also have a subdomain for the “problem site” for testing and it works too.

I’ve disabled all plugins with no luck. I installed Flamingo and I see the spam messages I sent, so I marked them ‘Not Spam’, but new messages (same e-mail) go to spam.

Do you have any other ideas before I contact my web host, because it sounds like I may have been hacked.

The page I need help with: [log in to see the link]