POPPER(8)

NAME

popper -- POP3 server

popper [-k] [-a plaintext|otp|sasl] [-t file] [-T seconds] [-d] [-i]
       [-p port] [--address-log=file]

popper serves mail via the Post Office Protocol. Supported options include:

-a plaintext|otp|sasl: Tells popper which authentication mode is acceptable, sasl enables SASL (RFC2222), and otp enables OTP (RFC1938) authentication. Both disable plaintext passwords.
--address-log=file: Logs the addresses (along with a timestamp) of all clients to the specified file. This can be used to implement POP-before-SMTP
authentication.
-d Enables more verbose log messages.
-i When not started by inetd, this flag tells popper that it has to: create a socket by itself.
-k Tells popper to use Kerberos for authentication. This is the tra: ditional way of doing Kerberos authentication, and is normally
done on a separate port (as it doesn't follow RFC1939), and
should be used instead of using SASL.
-p port: Port to listen to, in combination with -i.
-t file: Trace all commands to file.
-T seconds: Set timeout to something other than the default of 120 seconds.

RFC1939 (Post Office Protocol - Version 3)

The server was initially developed at the University of California,
Berkeley.

Many changes have been made as part of the KTH Kerberos distributions.