Answer the Email!
There is nothing that annoys me more than people who send me an email asking for some sort of help, I provide what I think they are looking for and ask for feedback so I can make necessary revisions, and then they either ignore my email or think it is fine to wait several days before responding.
What is amazing is that these requests were not initiated by me. I find it frustrating and think that a delayed or no response shows a total lack of respect.
When they finally reply, the excuse is often that they’ve been very busy. Who isn’t busy these days? I know there is a philosophy that you shouldn’t look at your emails too often or first thing in the morning so you can concentrate on what you need to do. But what about those people who are waiting for you to respond?
I don’t think it is a good use of time to check your emails every few minutes because that can impact your productivity. However, sometime during the day, I believe it is necessary to scan your messages and see which ones need immediate attention. Then answer, even if it is to say you need more time. A quick 30-second note to say, “Thanks for contacting me. I’ll get back to you with the information you need shortly” demonstrates your character. But then, of course, you need to follow through!
I’d love to hear your experiences with people not responding to emails, or phone calls too.

