I see. You have a wp site, right? Try registering with zoho mail. You can create upto 5 custom domain emails there, forever free. Follow their instructions and add the mx records, spf, dkim records and create your addresses. Once done, use some contact form plugin that mails through smtp (it's really simple to make one, too..), on your wp site that is. Login to zoho control panel, and enable smtp through settings. Then use the following:
smtp server: smtp.zoho.com
Port: 465
Encryption type:ssl
Encrypted password: false
U/P: your email address and password
That should do it.
To check/reply go to zoho.com/mail
Or download zoho app for windows/android.