Use your email domain to receive and send email.
In this article, we will use a Gmail address to setup SMTP.
Step 1: Go to this link with your Gmail account.
Step 2: Click App Passwords in Signing in to Google section (make sure 2-Step Verification is On)
Step 3: Select app > Other (Custom name). Type a name (For example: SMTP) and click GENERATE
Step 4: Copy your app password
Step 5: Go to our contact form app admin > SMTP and put your Gmail information