Authentication Types
Authentication for the email router is required for the connections to the email system and the user’s mailbox for each incoming and outgoing email profile.
Exchange Server supports only Windows Authentication for the incoming profiles. Exchange Online supports clear-text authentication. For POP3-compliant servers, incoming profiles can use NTLM or clear-text authentication.
Clear-text authentication transmits unencrypted usernames and passwords. If you use clear-text authentication, you should do so only with Secure Sockets Layer (SSL). The Use SSL option should be selected, and the Network Port field (on the Advanced tab) must be set to a value appropriate for your environment. Verify your POP3 server requirements with ...
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