An opportunity for the daring (like yours truly) to be wags, the priggish to be patronise — Dear Sender, please be advised and so on — and for the anal to clog up the word's inboxes by mysteriously contriving an automatically generated out-of-office message that replicates itself like a fruit-fly and issues in triplicate however many emails you send to the same person.

We suspect that those who generate multiple out-of-office messages are the same sort of folk who have never discovered their “sent items” folder, and hence cc themselves onto every email message they send, just so they don’t lose it.

See also