wenjie zheng wrote: [...]

rcpt to:testmail4a2@dev.p4nt5.com 250 2.1.5 OK DATA 354 OK From: testmail4a50@dev.p4nt5.com To: foo Subject: hello

Hello there

The vacation action requires that the mail explicitly lists the recipient in the To/Cc/etc headers of the message. Your test message does not contain the user's address in the To: header.

From RFC 5230:

==== 4.5. Address Parameter and Limiting Replies to Personal Messages

"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. An email address is considered to belong to the recipient if it is one of:

1. an email address known by the implementation to be associated with the recipient,

2. the final envelope recipient address if it's available to the implementation, or

3. an address specified by the script writer via the ":addresses" argument described in the next paragraph.

Users can supply additional mail addresses that are theirs with the ":addresses" argument, which takes a string-list listing additional addresses that a user might have. These addresses are considered to belong to the recipient user in addition to the addresses known to the implementation.

In the log: Jan 15 15:38:07 mail4a dovecot: lmtp(31612, testmail4a2@dev.p4nt5.com): eMcYKg7gUEt8ewAA0TR52A: sieve: msgid=unspecified: discarding vacation response for message implicitly delivered to testmail4a2@dev.p4nt5.com

Hence, you get the above log message, indicating no vacation response is sent.

Regards,

Stephan.