Following from Steffen Kaiser's response, RFC5230 explains the conditions necessary for the Sieve Vacation extension to trigger a response. This says:
"Vacation" MUST NOT respond to a message unless the recipient user's email address is in a "To", "Cc", "Bcc", "Resent-To", "Resent-Cc", or "Resent-Bcc" line of the original message.
So your scenario 4 happens when the sender is only in the envelope, and not in the headers.
For example: this transaction will get a response because the mailbox address is in the To: header
ehlo there.com mail from: <dude@there.com> rcpt to: <user@domain.tld> << envelope recipient, mailsystem routes with this information data To: "Some User" <user@domain.tld> << header recipient must be correlated for Sieve Vacation to send a response From: "Dude" <dude@there.com> Subject: message
Hi there .
This transaction will not get a response, and will trigger the "discarding vacation response for message implicitly delivered to <user@domain.tld> " log:
ehlo there.com mail from: <dude@there.com> rcpt to: <user@domain.tld> data Subject: message
Hi there .
Cheers,
-Martin Foster
Le 12-Feb-10 21:00, dovecot-request@dovecot.org a écrit :
Message: 9 Date: Fri, 12 Feb 2010 09:18:23 +0100 From: Lampa<lampacz@gmail.com> Subject: [Dovecot] sieve vacation To: Dovecot Mailing List<dovecot@dovecot.org> Message-ID: <9aef75b11002120018v69f185b5hb0a9e0f7dad1e5c5@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1
Hello,
scenario:
OK 1. created vacation script (see below) OK 2. send message fromuser@anotherdomain.tld touser@domain.tld => got auto vacation response (2010-02-11T19:42:13) OK 3. send message fromuser@anotherdomain.tld touser@domain.tld => no response (is ok because ":days 1" settings) (2010-02-11T19:47:46) BAD 4. send message fromanotheruser@anotherdomain.tld to user@domain.tld => no response (2010-02-11T19:48:04)
Why is discarding vacation response for message implicitly delivered to<user@domain.tld> ?
log: 2010-02-11T19:42:13.669321+01:00 hermes dovecot: deliver(user@domain.tld): sieve: msgid=<052a01caab49$ec4752e0$c4d5f8a0$@tld>: sent vacation response to <user@anotherdomain.tld> 2010-02-11T19:42:13.732541+01:00 hermes dovecot: deliver(user@domain.tld): sieve: msgid=<052a01caab49$ec4752e0$c4d5f8a0$@tld>: stored mail into mailbox 'INBOX' 2010-02-11T19:47:46.271534+01:00 hermes dovecot: deliver(user@domain.tld): sieve: msgid=<053201caab4a$b295ece0$17c1c6a0$@tld>: discarded duplicate vacation response to<user@anotherdomain.tld> 2010-02-11T19:47:46.275891+01:00 hermes dovecot: deliver(user@domain.tld): sieve: msgid=<053201caab4a$b295ece0$17c1c6a0$@tld>: stored mail into mailbox 'INBOX' 2010-02-11T19:48:04.958622+01:00 hermes dovecot: deliver(user@domain.tld): sieve: msgid=<053701caab4a$bda90220$38fb0660$@tld>: discarding vacation response for message implicitly delivered to<user@domain.tld> 2010-02-11T19:48:04.965875+01:00 hermes dovecot: deliver(user@domain.tld): sieve: msgid=<053701caab4a$bda90220$38fb0660$@tld>: stored mail into mailbox 'INBOX'
vacation script:
require "vacation";
vacation :days 1 :subject "Auto reply"
"auto reply message";
Thank you -- Lampa ------------------------------