Help: Has anyone had issues with the contact form not sending emails!

Hi everyone

Has anyone had any issues with the contact form widget not sending emails out. I have 2 sites that it works fine on, an old site that has stopped and 2 new sites where emails are also not going out from?

I have disabled all widgets and it still does not work and I have tested using the Check and Log email plugin and emails go out.

I put a query in last week and I have not heard anything so I thought I would put a shout out

Has anyone experienced this and worked out how to fix it?

Many thanks
Roland