If you could do everything yourself, you wouldn't have coworkers. Sometimes, you need to enlist their help, but some may turn a simple request into a long thread of emails with too many opinions. When you start a new job, or you want to figure out who can help you at a current one, you just need to ask for something via email to find out who you can actually count on.
Developer and technical manager Brandon Aaskov found a certain kind of email reveals who you can rely on and who can't:
The best way to test this at your company (if it's not already obvious, or if you're new) is to email someone directly - don't CC anyone. If it's a casual email that really doesn't require any other input, and then suddenly there are more people in your email thread with the response, you know that someone is either covering their arse or trying to prove their job's worth. In either case, it's silly and unnecessary. It's the biggest reason we all get way more work emails than we otherwise should.
If you send enough of these emails in the beginning and keep track of the helpful responses you get, you can figure out who can help you most efficiently. When coworkers come back with requests to fill out forms or start copying in managers for no good reason, you know they're covering their backsides more than they're trying to help. If you can figure out who helps and who wastes time at your organisation quickly, you'll save yourself time in the long run.
CCing to CYA [Brandon Aaskov]