I have a WordPress website and I am not receiving emails that are being submitted using contact forms. I have tried several contact form plugins, I even tried a custom contact form I coded myself with no luck. The forms were working at one point but we always had issues with the Contact Form 7 plugin, that one never worked for some reason. I am at a loss as to why this is happening. I tried sending emails out using SMTP instead of php's mail() function and that did not work either.
Your could debug php mailer in WP using franz's wpmail_exceptions plugin https://gist.github.com/franz-josef-kaiser/5840282
Place the first file in
/wp-content/mu-plugins/ and make sure you've set
true. You should test while logged in as administrator. Errors will be printed in main buffer so make sure to inspect any xhr requests if your form works asynchronously (Ajax).