Wordpress site has been working well for many years. Now will not send any mail. Have a form plugin that saves form data so we know when forms are submitted. It is not the plug in. Wordpress itself will not send a confirmation for a new user. Last email received was on December 14, 2016.
Made sure all was updated. Updated PHP in Godaddy.
Could our shared IP be on a blacklist?
It's hard to say what exactly is causing your problem without looking at it. To be safe, I would try calling in and speaking with one of our Support Representatives so they can take a peek. You can contact us using any of these methods. I hope this helps!