- It is never the long one. It is always "Hi, as discussed, please see below." and then the whole office is on fire by noon.
- Add "just circling back on this" and you have a declaration of war.
- Not "per my last email". I have never seen anything so polite do so much damage.
- I once got cc-ed on one of these by accident and learned more about my department in four lines than in a year.
- The accidental cc is how everybody learns everything. HR should just make it official.
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