sieve vacation script problem

[Vittorio Manfredini]

I use :
cyrus-imapd 2.1.9
cyrus-sasl 2.1.7
postfix 1.1.11

All work fine, but now I would use sieve vacation script.

I put the vacation script on the user directory (/usr/sieve/.../user),

When I send mail to this user, the mail arrive correctly, but when the system
try to send back the vacation message I have some strange behaviour.

I include part of the log file and the vacation message.

Log:
Sep 25 11:25:17 host postfix/qmgr[1290]: EBE1455F1: from=<vittorio at domain.net>,
size=1414, nrcpt=1 (queue active)
Sep 25 11:25:17 host postfix/pipe[11891]: BB5B155EB: to=<lcorini at domain.com>,
relay=vscan, delay=3, status=sent (host.dotalia.com)
Sep 25 11:25:19 host postfix/pickup[11870]: 06A6455EE: uid=96 from=<>
Sep 25 11:25:19 host postfix/cleanup[11883]: 06A6455EE:
message-id=<cmu-sieve-11904-1032945918-0 at host>
Sep 25 11:25:19 host postfix/qmgr[1290]: 06A6455EE: from=<>, size=469, nrcpt=1
(queue active)
Sep 25 11:25:19 host postfix/pipe[11902]: EBE1455F1: to=<lcorini at domain.com>,
relay=cyrus, delay=3, status=sent (host.domain.com)
Sep 25 11:25:20 host amavis[11910]: starting.  amavis 0.3.12pre5 Mon Mar 25
21:00:43 UTC 2002
Sep 25 11:25:20 host postfix/smtpd[11896]: connect from localhost[127.0.0.1]
Sep 25 11:25:20 host postfix/smtpd[11896]: B754555F2: client=localhost[127.0.0.1]
Sep 25 11:25:20 host postfix/cleanup[11883]: B754555F2:
message-id=<cmu-sieve-11904-1032945918-0 at host>
Sep 25 11:25:20 host postfix/smtpd[11896]: disconnect from localhost[127.0.0.1]
Sep 25 11:25:20 host amavis[11910]: do_exit:899 - ending execution with 0
Sep 25 11:25:20 host postfix/qmgr[1290]: B754555F2: from=<>, size=698, nrcpt=1
(queue active)
Sep 25 11:25:20 host postfix/pipe[11891]: 06A6455EE:
to=<cyrus at unspecified-domain.domain.com>, relay=vscan, delay=2, status=sent
(host.domain.com)
Sep 25 11:25:21 host postfix/smtp[11913]: B754555F2:
to=<cyrus at unspecified-domain.domain.com>, relay=none, delay=1, status=bounced
(Name service error for name=unspecified-domain.domain.com type=A: Host not found)

vacation script
# Mail rules for user lcorini
# Created by Websieve version 0.61h
require ["fileinto","vacation"];


vacation :days 1 :addresses ["lcorini at domain.com"] text:
Autogenerated Message:
On vacation for the next week