Stopeed working

Hi,

The plugin was working.
I see Postman has delivered 2718 emails for you. in the dashboard. Lately I stopped getting emails so I decided to check and it’s not working any more. Start the wizarg is going fine but I get this error when try to send letters from the site
Failed to send your message. Please try later or contact the administrator by another method.

https://wordpress.org/plugins/postman-smtp/