Krantz / Docs

POP3 Protocol

POP3 (Post Office Protocol version 3) is a fallback protocol when IMAP is unavailable.

Overview

POP3 is an older email protocol. Krantz Mail uses it as a fallback when IMAP isn’t available.

When POP3 is Used

POP3 activates as a fallback when:

  • IMAP connection fails
  • Server doesn’t support IMAP

Limitations

POP3 has some limitations compared to IMAP:

  • No folder access (inbox only)
  • No email viewing capabilities
  • Authentication-only checks

Recommendation

Keep POP3 enabled for maximum compatibility.