POP-Server reaction to user logged in twice

[Markus G. Klötzer]

This applies to both pop.clara.net & pop.freeuk.com

Normally the server rejects a second conection with "-ERR Make lock
failed" which is fine, but in about 30% of cases it doesn't notice the
dual login - nothing dramatic, but it exposes a security problem in
the server software.

Before I get asked why: I run an "All servers" comand which pulls all
pop-servers in sequence. In a addition it pulls pop.freeuk.com
parallel due to large volume of emails on that mailbox. pop.clara.net
gets affected if I run a manual session which then gets caught by the
automatic (every 20 minutes) pull.
--
Karate is a form of martial arts in which people who
have had years and years of training can, using
only their hands and feet, make some of the worst
movies in the history of the world. -- Dave Barry