Net::POP3 - Post Office Protocol 3 Client class (RFC1939)


    use Net::POP3;
    # Constructors
    $pop = Net::POP3->new('pop3host');
    $pop = Net::POP3->new('pop3host', Timeout => 60);
    if ($pop->login($username, $password) > 0) {
      my $msgnums = $pop->list; # hashref of msgnum => size
      foreach my $msgnum (keys %$msgnums) {
        my $msg = $pop->get($msgnum);
        print @$msg;


This module implements a client interface to the POP3 protocol, enabling a perl5 application to talk to POP3 servers. This documentation assumes that you are familiar with the POP3 protocol described in RFC1939.

A new Net::POP3 object must be created with the new method. Once this has been done, all POP3 commands are accessed via method calls on the object.


new ( [ HOST ] [, OPTIONS ] 0

This is the constructor for a new Net::POP3 object. HOST is the name of the remote host to which an POP3 connection is required.

HOST is optional. If HOST is not given then it may instead be passed as the Host option described below. If neither is given then the POP3_Hosts specified in Net::Config will be used.

OPTIONS are passed in a hash like fashion, using key and value pairs. Possible options are:

Host - POP3 host to connect to. It may be a single scalar, as defined for the PeerAddr option in the IO::Socket::INET manpage, or a reference to an array with hosts to try in turn. The host method will return the value which was used to connect to the host.

ResvPort - If given then the socket for the Net::POP3 object will be bound to the local port given using bind when the socket is created.

Timeout - Maximum time, in seconds, to wait for a response from the POP3 server (default: 120)

Debug - Enable debugging information


Unless otherwise stated all methods return either a true or false value, with true meaning that the operation was a success. When a method states that it returns a value, failure will be returned as undef or an empty list.


Attempt SASL authentication.

user ( USER )

Send the USER command.

pass ( PASS )

Send the PASS command. Returns the number of messages in the mailbox.

login ( [ USER [, PASS ]] )

Send both the USER and PASS commands. If PASS is not given the Net::POP3 uses Net::Netrc to lookup the password using the host and username. If the username is not specified then the current user name will be used.

Returns the number of messages in the mailbox. However if there are no messages on the server the string "0E0" will be returned. This is will give a true value in a boolean context, but zero in a numeric context.

If there was an error authenticating the user then undef will be returned.

apop ( [ USER [, PASS ]] )

Authenticate with the server identifying as USER with password PASS. Similar to login, but the password is not sent in clear text.

To use this method you must have the Digest::MD5 or the MD5 module installed, otherwise this method will return undef.

banner ()

Return the sever's connection banner

capa ()

Return a reference to a hash of the capabilties of the server. APOP is added as a pseudo capability. Note that I've been unable to find a list of the standard capability values, and some appear to be multi-word and some are not. We make an attempt at intelligently parsing them, but it may not be correct.

capabilities ()

Just like capa, but only uses a cache from the last time we asked the server, so as to avoid asking more than once.

top ( MSGNUM [, NUMLINES ] )

Get the header and the first NUMLINES of the body for the message MSGNUM. Returns a reference to an array which contains the lines of text read from the server.

list ( [ MSGNUM ] )

If called with an argument the list returns the size of the message in octets.

If called without arguments a reference to a hash is returned. The keys will be the MSGNUM's of all undeleted messages and the values will be their size in octets.

get ( MSGNUM [, FH ] )

Get the message MSGNUM from the remote mailbox. If FH is not given then get returns a reference to an array which contains the lines of text read from the server. If FH is given then the lines returned from the server are printed to the filehandle FH.

getfh ( MSGNUM )

As per get(), but returns a tied filehandle. Reading from this filehandle returns the requested message. The filehandle will return EOF at the end of the message and should not be reused.

last ()

Returns the highest MSGNUM of all the messages accessed.

popstat ()

Returns a list of two elements. These are the number of undeleted elements and the size of the mbox in octets.

ping ( USER )

Returns a list of two elements. These are the number of new messages and the total number of messages for USER.

uidl ( [ MSGNUM ] )

Returns a unique identifier for MSGNUM if given. If MSGNUM is not given uidl returns a reference to a hash where the keys are the message numbers and the values are the unique identifiers.

delete ( MSGNUM )

Mark message MSGNUM to be deleted from the remote mailbox. All messages that are marked to be deleted will be removed from the remote mailbox when the server connection closed.

reset ()

Reset the status of the remote POP3 server. This includes reseting the status of all messages to not be deleted.

quit ()

Quit and close the connection to the remote POP3 server. Any messages marked as deleted will be deleted from the remote mailbox.


If a Net::POP3 object goes out of scope before quit method is called then the reset method will called before the connection is closed. This means that any messages marked to be deleted will not be.


the Net::Netrc manpage, the Net::Cmd manpage


Graham Barr <>


Copyright (c) 1995-2003 Graham Barr. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.