tut mir leid, aber ich habe über die Suche nichts gefunden. Nachdem ich mir die qmail Buglist mal näher angeschaut habe, ist mir folgendes sofort in aufgefallen:
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2.2. Maildir file name creation is not collision proof. Mail loss possible depending on mail user agent.
Qmail's maildir delivery code assumes that a process ID is unique for one second. It is not, on fast and heavily loaded systems, or systems that randomize the process ID, the same process ID can be reused in the same second, even multiple times. If mail delivery and mail reading with a user agent overlap in time, this can lead to mail loss depending on how cautious the mail user agent is when moving mail from new/ to cur/. DJB claims qmail-pop3d is safe, other applications, for example mutt, rely on the uniqueness of the file names and can cause mail loss. It's qmail's responsibility to use unique file names though.
Fix: Toby Betts has a patch to make maildir file names uniqueDanke schonmal..
(und hoffentlich war das langsam mal die letzte Frage;)