I am developing a new mail server anti spam solution called decency.  It is a one-in-all solution attempt implementing a policy server (postfix policies), a content filter and a log parser. All three of them run in separate servers but are designed to communicate with each other to improve the spam detection rate a lot. [...]

In our Mailservers (Postfix) we use a lot of policy-servers, which are custom perl servers, eg granting sender permissions to external mailservers or building live-statistics of mail throughput. However, i recently ran into some problems starting one of those which uses a berkley database backend (aka bdb via BerkleyDB and BerkeleyDB::Env with DB_INIT_MPOOL from CPAN). [...]

You maybe know this scenario: At some sunny morning some guy using your mailservers decides to send a reaal big mailing via you and has forgotten to be polite and to remove all the recipients who does not exist any more (as in: adress closed) and even less polite: to remove all recipients who want [...]

Eigentlich wollte ich heute was über UTF-8 und Perl schreiben aber dafür bin ich zu müde.. Daher lieber eine kurzer Abriss aus dem Mailserver Alltag: Heute sollte ich einem Kunden eine Mailkommunikation nachvollziehbar machen. Es ging darum ob ein spezieller Absender tatsächlich an einen Empfänger versand hat oder nicht. Und wenn ja wann und wie [...]