Hello, i'm answering on this thread because it is the most recent one and I have the same problem like many other people here with vacation and sieve. I found this thread: http://www.imc.org/ietf-mta-filters/mail-archive/msg00898.html about vacation working if localpart of reveivers emailaddress is in upper case. I tried it (:addresses ["XXXX@xxxxxxxxxx",....]) and it worked. The mail from vacation then has also a "From:XXXX@xxxxxxxxxx" sender address with localpart in upper case. The question is, at which part of the email workflow does this conversion take place? I use sendmail as MTA, and the configuration for local mail delivery is as follows: define(`confLOCAL_MAILER', `cyrusv2') define(`CYRUSV2_MAILER_ARGS', `FILE /var/run/cyrus/socket/lmtp')dnl MAILER(`cyrusv2') Is this a sendmail or a cyrus (configuration) issue? Kind Regards, Holger Haas ________________________________________________________________________ FreiNet Gesellschaft fuer Informationsdienste mbH Loerracher Strasse 5a, D-79115 Freiburg Telefon: +49-761-496-1700, Fax: +49-761-496-1790 http://www.freinet.de Registergericht AG Freiburg i. Br. - HRB 4758 Geschaeftsfuehrung: Manfred Neufang USt-Id-Nr.:DE142316038 - FA Freiburg Stadt - Steuernummer 06425/40959 Sparkasse Freiburg-Noerdlicher Breisgau - BLZ 680 501 01 - Konto 10105414 ________________________________________________________________________ ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html