Which of the following is true of IMAP?

Which of the following is true of IMAP?

• It uses port 110
• It sends and receives email
• It can only be used to send email
• It leaves messages on the mail server 

EXPLANATION

Unlike POP3, IMAP does not directly download and then remove messages from the mail server. Instead, it leaves the email on the server so that messages can be retrieved from various locations. IMAP is used only to retrieve email and uses port 143.
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SOURCE

https://www.siteground.com/tutorials/email/pop3-imap-smtp-ports.htm