Internet Message Access Protocol (IMAP) is a communication standard to access email stored on the server.The available imap types correspond to the different connection, and security options used when connecting to the imap server. This allows direct integrations with technologies such as Microsoft Exchange servers. IMAP authentication uses a mailing systems IMAP protocol to check for users accounts.Use this tool if you a client/user is having a problem accessing their email and you want to see if you can reproduce the problem without setting up their account in your email client. Use this form to test if your POP3 or IMAP mail server returning mail.