Yes. POPFile supports APOP.
Important Note: Please turn off the APOP option in your mail client.
Currently, APOP is used only between POPFile and the mail server of your ISP. Authentication between your mail client and POPFile is not encrypted:
|Your mail client||⇒||POPFile||⇒||Your ISP|
So, even if your mail client does not support APOP, you can use APOP between POPFile and your ISP.
Note: Your password will be sent as plaintext in the connection between your mail client and POPFile.
You can verify the log files (which are in POPFile data folder) to know whether APOP is used or not. If you see auth APOP in the log, APOP authentication is used. On the contrary, if you see auth plaintext, POPFile connects to your ISP without using APOP.
Note: These logs are recorded only if the Logger Level is set to 2.