popper(8) POP3 server


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


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

-a plaintext | otp | sasl
Tells 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.
Enables more verbose log messages.
When not started by inetd, this flag tells that it has to create a socket by itself.
Tells to use Kerberos for authentication. This is the traditional 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.