It's generally considered inconsiderate, not to mention an indiscrete advertisement of a potentially vacant house, to allow 'vacation' autoresponses to list mail.
I've received over a half-dozen of same in response to my most recent post to this list. I'd strongly encourage subscribers to double-check their mail rules, and reconsider use of a vacation message at all. A delegated forward would likely be more useful, less annoying, and less a security issue.
I don't like (and don't use) vacation messages either, but I think that the good ones (not them all unfortunately) test if there is a Precedence: bulk header, and this list (software?) doesn't provide such a header.
Paul -- Philosophie de baignoire - consultations sur rendez-vous.
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