Willy, Am 26.04.19 um 21:08 schrieb Willy Tarreau: > It's funny that I just received one such message in response to my response, > with "X-Auto-Response-Suppress: All" in it, very likely set to avoid > looping. It's tempting to try with this one. Sadly I immediately remove > all of these so I don't have a collection to see what values are presented. > > Hmmm I'm wrong, there's the archive on the mail server itself. > > $ grep '^X-Auto-Response-Suppress:' archives-haproxy | sort|uniq -c|sort -nr > 34 X-Auto-Response-Suppress:OOF > 6 X-Auto-Response-Suppress: OOF,AutoReply > 2 X-Auto-Response-Suppress: All > > So apparently the "OOF" pattern you found indeed seems mostly used. >
By specifically searching for 'OOF' I found this documentation from Microsoft [1]. OOF means 'out of office' (why isn't it OOO?) which make up the bulk of the autoreplies so I guess that one is a good starter to check how it works. [1] https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/ms-oxcmail/ced68690-498a-4567-9d14-5c01f974d8b1 Best regards Tim Düsterhus
