Connection could not be established with host mailtrap.io :stream_socket_client(): unable to connect to null.://mailtrap.io:2525 (Unable to find the socket transport "null." - did you forget to enable it when you configured PHP?) code example

Example: Connection could not be established with host smtp.gmail.com :stream_socket_client(): unable to connect to tcp://smtp.gmail.com:587 (Network is unreachable)

I solved my problem in cpanel using the code:

inside `.env` file change 

	MAIL_DRIVER=smtp 
to
	MAIL_DRIVER=sendmail