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by bitJericho 3224 days ago
I've never seen it. I'm sure that works "in theory"
2 comments

A quick Google for "outlook autoreply headers" gave me https://www.jitbit.com/maxblog/18-detecting-outlook-autorepl... -- a more comprehensive list of headers is available at https://github.com/jpmckinney/multi_mail/wiki/Detecting-auto...

Will some things filter through this list? Undoubtedly, but I would be surprised if it's a significant percentage. Extremely high-volume lists probably need some more specific care, to be sure.

Couldn't you filter most of them out by the timestamp? If you get a reply that was sent faster than a human could have responded, ignore it.
The auto-reply is probably sent by a desktop email client, which are often offline and/or configured to only check for new email every few minutes. So you'd fail to mark a lot of auto-replies.
Exchange configures it on the server because generally people have their computers turned off when on holidays.