Mailbox provider

A mailbox provider, mail service provider or, somewhat improperly,^[1] email service provider is a provider of email hosting. It implements email servers to send, receive, accept, and store email for other organizations or end users, on their behalf.

The term "mail service provider" was coined in the Internet Mail Architecture document RFC 5598.^[2]

^ "M³AAWG Anti-Abuse Best Common Practices for Hosting and Cloud Service Providers" (PDF). M³AAWG. March 17, 2015. Email Service Provider – A company that offers services to send email at volume.
^ Dave Crocker (July 2009). "Administrative Actors". Internet Mail Architecture. IETF. sec. 2.3. doi:10.17487/RFC5598. RFC 5598. Retrieved 18 April 2013.

[1] "M³AAWG Anti-Abuse Best Common Practices for Hosting and Cloud Service Providers" (PDF). M³AAWG. March 17, 2015. Email Service Provider – A company that offers services to send email at volume.

[email-arch-2] Dave Crocker (July 2009). "Administrative Actors". Internet Mail Architecture. IETF. sec. 2.3. doi:10.17487/RFC5598. RFC 5598. Retrieved 18 April 2013.

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