Cannot send email

Able to receive but not send email. I have tried many combinations of ports/security settings but always get this error:  "An attempt was made to access a socket in a way forbidden by its access permissions 64.233.171.109:25

That appears to be a Google IP which implies a gmail or G Suite account? If that’s the case, then the automatic setup for Emclient using “Gmail” should work. In any event, the correct SMTP settings should be “smtp.gmail.com” on Port 587 using “Force usage of SSL/TLS”. Try that?