Despite the fact that SMTP operates at the application layer, It is just a protocol, not a program package. A mail server (typically Particular software program working with a focused machine) implements SMTP to communicate with other servers. At Twilio SendGrid, we work with A huge number of firms https://www.peopleperhour.com/hourlie/migrate-your-wordpress-site-to-a-new-server-account-or-domain/492218