CMS Made Simple Forums

Hello, I've 2 CGBetterForms instances v 1.9.1 installed on 2 different websites (one is installed on cmsms version 2.2.10, other is installed on cmsms v. 2.2. and different hosting service. Those are stopped to work several days ago, without any notice or advice! Form seems to send message, it doesn't shows any error message but no email are received. It's a very strange behaviour.
I've tried to use a blank template and I've tried to install another cmsms instance but without luck....
I've tried to use a previous CGBetterForms version, even updating and downgrading cmsms too, without obtaining the correct behaviour.
Which kind of problem it could be?!?!

You would need to determine what has changed on your server. Things don't just stop working.
Check things like:
-free disk space
-PHP version
-error logs
-email logs

If the forms are submitting but you're not receiving emails, it's probably something to do with routing or spam filtering. Try generating a test message from the CMSMS email settings page. Check with your host about routing, and check your server for bouncebacks.

Thank you for response. I'll check your bullet point, but I wrote a bad sentence/title: in these 2 installations CGBetterForms never worked. No updates or other changes. These websites are running on different hostings