Solution 1:

You should connect using SSL, this goes through port 995. On the server you should enable this in your /etc/inetd.conf:

pop3s   stream  tcp     nowait  root    /usr/sbin/tcpd /usr/sbin/ipop3d

Than restart inetd

/etc/init.d/inetd restart

Reconfigure your pop3 client so it uses SSL passwords trough port 995. And it all should
work… If you are using the server behind NAT, don’t forget to forward
the port 995!

Solution 2:

But I had a problem with all my old Macintoshes connecting to my internal ‘debian/unstable (SID)’ pop3 (ipopd) server. Here’s how I enabled the plain text passwords again, and how I compiled new debian (.deb) packages again. (A real step-by-step howto I wrote for a friend of mine, so just copy paste the bold lines into your root shell. Even my mum can do this ;) )

First I created a directory:

mkdir /usr/src/ipopd

Go to the new created dir:

cd /usr/src/ipopd

And downloaded the debian source package:

apt-get source ipopd

Get dependencies:

apt-get build-dep ipopd

Now you should have the following:

• uw-imap-2002edebian1
• uw-imap_2002edebian1-3.diff.gz
• uw-imap_2002edebian1-3.dsc
• uw-imap_2002edebian1.orig.tar.gz

Go to the directory ‘uw-imap-2002edebian1′

cd /usr/src/ipopd/uw-imap-2002edebian1

Edit the make file:

vi Makefile

Search for the config line (now some crash course vi 4 U :-)

/SSLTYPE=nopwd

(’/’ means search in vi and vim and we’re going to look for the needle ‘SSLTYPE=nopwd’, to search again for the same needle, use a backslash)

Edit the line:

i

(this will enable the editor, now you can type into the document, change the line ‘SSLTYPE=nopwd’ to ‘SSLTYPE=none’ when you don’t want to use SSL, set the line to ‘SSLTYPE=unix’ when you want to be able to use both.)

SSLTYPE=none

Now press the escape button on your keyboard ;) This will disable the editor again so we can give commands to save and quit…

:wq

(’:’ will give a command, ‘w’ = write, ‘q’ = quit)

Now we should have a prompt again… Let’s bake a package. ;) Now you’ll have to change the changelog, or else when we’ve build and installed this package, and we do an apt-get upgrade, our fresh baked package will be overwritten by the original one again. Now concentrate! ;) You’ll need to edit the changelog in a special
format.

Open the file in vi and ADD the following lines AT THE TOP of the changelog file:

vi debian/changelog

uw-imap (7:2002edebian1-3b1) unstable; urgency=low

  * Disabled secure passw...

 -- Daantje   Mon, 05 Apr 2004 20:34:34 +0200

Please mind the TWO spaces, between the email address and date!
I’ve updated the original version ‘7:2002edebian1-3′ to ‘7:2002edebian1-3b1′ so the next upgrade will be done by apt-get when there’s a new release.

Now compile it with the debian script:

debian/rules build

(Wait while your machine compiles…)

debian/rules binary

(Wait while your machine creates the packages…)

The packages should be one directory above, we want to install them all! ;)

dpkg -i ../*.deb

(Wait wile it’s installing the packages)

We are done! Check your mail! Drink beer!

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