TPOP3Send.AuthType
TPOP3Send

property AuthType: TPOP3AuthType;

Unit
POP3send

Description
Type of authorisation for login to POP3 server. Dafault is autodetect one of possible authorisation.

Autodetect do this:

If remote POP3 server support APOP, try login by APOP method. If APOP is not supported, or if APOP login failed, try classic USER+PASS login method.