Free pop3 software for linux

With SMAN you can access your POP3 account and send all your mails.
SMAN is a TCL mail manager for X11, compatible with TCL 7.5 and Wishx 4.1.
Main features:
- Recieve mail from a POP3 server
- Send mail by an SMTP server
- MIME attachments
- Address book
- TO, CC, BCC lists
- Draft messages
- Sent mails

LHMail is an email library written in Qt able to send messages over SMTP protocol and receive via POP3, suitable for implementing email clients.
Main features:
- SMTP support
- POP3 support
- Widget for displaying message contents (screenshot)
- Attachements
- HTML messages (screenshot)
- Email forwarding
- Launching user-defined external applications
- Email adresses validation
- S/MIME signatures
Enhancements:
- New features include the ability to sign messages with S/MIME signature, verification of S/MIME signatures, and PEM format key and certificate support.

nugu is a biff-like utility which scans either an IMAP4 or POP3 mail server account and relays an abbreviated copy of the unread email to the users cell phone.
The user can constrain which messages get relayed by defining a query in a configuration file. nugu is meant to be run as a cron job.
Enhancements:
- Support for --notruncate and --abbreviate command line options was added.
- --notruncate refrains from truncating a message to the 160 character SMS limit.
- --abbreviate attempts to provide "text-readable" compression by simply ommitting vowels in words that are longer than 4 characters.

WMpop is a Window Maker DockApp for monitoring a local (mbox format) or POP3 mailbox. WMpop project displays:
- number of mails in the mailbox (or unread mails if checked in the preference screen),
- a scrolling text with the email address of the senders (only for local mailbox for the moment),
- and a status led, indicating mail checking progression and errors.
WMpop can be configured via a graphic interface written in GTK+. The configuration interface let you define parameters of your POP3 server, and let you personalize the app (changing icons or sound and choosing an external command to launch on demand).
It is internationalized, with French translation. You can also run several instances of the program of different mailboxes (remote or local).

lollipop is a POP3 server that is almost RFC 1939 compliant. lollipop main goal is speed, since it is designed for users who store very large numbers of messages (>4000) on the server. It only supports the maildir storage format.
This is an almost rfc1939 compliant POP3 server. The main goal of this program is the speed, especially if you have many mails in your maildir (>4000) and you want to store your mails on the server.
I created this program to provide a solution for my problem. I have a small server in my house and this collects my emails from my addresses (fetchmail, exim local delivery). I have a very good backup system for this machine, powered by dirvish. I have two desktops and a laptop computers. I want to store all of my emails (over 6000) on the server in maildir - mainly because this is an archived machine.
I tried to use IMAP, but unfortunately I found it slow even on fast ethernet LAN. I switched to POP3 with leave on server option but the statistic step was very-very slow. On my laptop I got timeouts before the statistic step done so its impossible to use this method on this slow machine.
Finally I decided to write a special POP3 server for this task. Poppy has memory and it reports as new mail only the new mails after the last download for that location. Its supports only maildir because for this solution, the mailbox isnt optimal. Your maildir must be in ~/.maildir if you use maildir with other name, create a link to it.
Configure: change the LAN address to your LAN (for example 192.168.1.1) in the beginning of the script.
Usage: just start it in the background. (./lollipop.pl &) and make sure not using another pop3 server.
Enhancements:
- CAPA in AUTH state was fixed.

easy emailsManager (eEM) is a Web-based multi-user application for managing email.
easy emailsManager can manage multiple email accounts with different protocols (IMAP, POP3, NNTP) and share selected email with other users (of your own group, for example).
Main features:
- User, Group and Permission Management
- Emails Management
- German and English
- Editable Navigation tree
- Mandators (experimental)
- Extensible by plugins (experimental)

PAM has traditionally assumed that services doing authentication have the ability to interact with the user. Unfortunately, this isnt true for services that implement non-interactive and/or fixed protocols, such as FTP and POP3.

This is typically worked around by making the flawed assumption that PAM_PROMPT_ECHO_ON requests the username and PAM_PROMPT_ECHO_OFF requests the password.

With pam_userpass, this assumption is no longer required. pam_userpass uses PAM binary prompts to ask the application for the username and password specifically.

pam_userpass doesnt perform any actual authentication. An actual authentication module should be stacked after pam_userpass and told to use the authentication token (password) provided by pam_userpass.