Each email service provider has specific MX records (examples below).

• Google Workspace example: ASPMX.L.GOOGLE.COM or SMTP.GOOGLE.COM
• MS 365 example: mydomain-com.mail.protection.outlook.com
• cPanel example: mail.mydomain.com

IN-DEPT EXPLANATION:

https://www.youtube.com/watch?v=f4YV_QaRKtc