smpt not functioning

Hi,

I had this working in the early development have only added cache etc and now it’s not working with my divi contact forms

error details are
There was a problem while sending the test email.
An issue was detected.

This means your test email was unable to be sent.

Typically this error is returned for one of the following reasons:

– Plugin settings are incorrect (wrong SMTP settings, invalid Mailer configuration, etc).
– Your web server is blocking the connection.
– Your host is rejecting the connection.

I’m not sure what I can do to diagnose some of these ill be looking for a resolution on my own also firstly I am going to attempt adding the smpt to my hosting control panel makes sence this could fix this issue

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