[Dovecot] sieve parse error

Hello everyone,

I'm using Dovecot (v1.0.beta3-3ubuntu5.4 under Ubuntu) with postfix and LDA with virtual users. Everything is working fine.

To filter mails I use the Dovecot Sieve feature. But I get some strange error for one simple Sieve script:

require "fileinto";

if header :contains ["to", "Cc", "Bcc"] ["freewrt-users@freewrt.org"] { fileinto "Mailinglists.FreeWRT"; stop; }

elseif header :contains ["to", "Cc", "Bcc"] ["getmail@discworld.dnsalias.org"] { fileinto "Mailinglists.getmail"; stop; }

This is the error I get in mail.log:

May 6 15:47:08 gehirnschnecke deliver: sieve parse error for matthias@adminlife.net: line 8: syntax error, unexpected IF, expecting '{'

After studying sieve.info my sieve script should be correct. What could be wrong here?

Thanks & best regards Matthias