High Sierra has some new features for the mail App, and here is how they work.
Better Search
Just like Spotlight the Mail App now supports natural language search, if that phrase leaves you stumped it means you can search using in a more natural way such as using “from Jon last week” rather than specifically jon@gmail.com 11/13/2017.
You can be even more vague here is an example “jon@ November 2017”.

Other examples include searching for a spreadsheet with “Numbers file” rather than searching for a “.xls” or “.numbers”

Split View
This is a familiar feature of iPhones and iPads, if you like to use mail in full Screen to get rid of the clutter on your Mac the Mail App now allows you to easily write replies and open other emails with each new message opening in a Tab on the right-hand side.
When you hit compose the message list on the left-hand side stays where it is and the last email you were looking at stays open.

And let’s say you also want to have quick access to another email simply double click on that message and it opens in a tab on the right-hand side.

This is great for productivity when you want to use full screen mode in Mail.
Under the Hood, you may not see these improvements with your eyes but Mail now makes your searches faster, Apple had announced a reduction in Mailbox sizes. So far We haven’t been able to see this other than with the improvements with the new APFS .
Top Hits
The search functionality for Mail now provides Top Hits with osX High Sierra, if you are disappointed not to see this feature after upgrading to High Sierra keep searching as it’s part of the machine learning and needs to learn what you look at the most and how you search for items in your inbox!

Related Posts
What is the Managed App Store & Why you need it
This can lead to unsavory results. Results like a version of Chrome that updates and starts to slow down your computer because it was written for 10.13 but your still on 10.10....
Moment Helps You Gauge Your iPhone Use
To start, you might want to quantify the problem, and for that, you can turn to a free iPhone app called Moment. Written by developer Kevin Holesh, Moment is designed to track...
Block Telemarketing Calls Automatically on Your iPhone
But no. When you answer, it’s “Heather,” a pre-recorded voice wanting to sign you up for a resort vacation, give your business a loan, or help with your credit card debt. Angered...
Does your iPhone battery need to be replaced?
If your like me you want to check the status of your iPhone’s processor speed to see if it is being throttled and/or check if your iPhone battery needs replacing here’s how...
Our Top 5 free macOS App picks for 2017
iBooks Author With its iWork like workflow if you are used to Numbers and Pages iBooks author will get publishing your eBooks in no time.
Don’t think you need Accessibility help with your iPhone?
Well one really useful Accessibility tool is the AssistiveTouch feature, if your iPhone power button stops working for example how can you restart the device or lock the screen? (hint the iPhone...