Context: Many mailbox providers are also access providers, while others are not (e.g., Yahoo! Mail, Outlook.com, Gmail, AOL Mail, Po box). The definition given in RFC 6650 covers email hosting services, as well as the relevant department of companies, universities, organizations, groups, and individuals that manage their mail servers themselves. The task is typically accomplished by implementing Simple Mail Transfer Protocol (SMTP) and possibly providing access to messages through Internet Message Access Protocol (IMAP), the Post Office Protocol, Webmail, or a proprietary protocol.

Question: What is SMTP?
Answer: Simple Mail Transfer Protocol

Question: What is IMAP?
Answer: Internet Message Access Protocol

Question: How is access to mail provided? 
Answer: implementing Simple Mail Transfer Protocol (SMTP) and possibly providing access to messages through Internet Message Access Protocol (IMAP), the Post Office Protocol, Webmail, or a proprietary protocol.

Question: what are most mailbox providers as well? 
Answer: access providers

Question: who possibly controls their own mail servers? 
Answer: companies, universities, organizations, groups, and individuals

Question: All mailbox providers were also what?
Answer: Unanswerable

Question: What are examples of access providers?
Answer: Unanswerable

Question: What is used by organizations that depend on others to provide mail services?
Answer: Unanswerable

Question: How is traditional male provided?
Answer: Unanswerable