i learned the SCRAP mnemonic a long while ago: Situation; Complication; Resolution; Actions; Politeness.

works when the recipient is attuned to it. when the recipient is attuned to flowery/over-polite language i've found they can get upset/assume you're being rude/dismissive.

decent guidelines, esp for someone new to office work. my advice: nobody wants to read your email, so if you must send one keep it extremely short: between 0 to 3 sentences.