EXPLAINED… Mail’s interface
1 Multi accounts
You can add multiple accounts from different providers and view those messages in a unified inbox.
2 VIP senders
If you specify a sender as a VIP, you can then set rules to treat messages from those senders differently.
3 Sneak preview
The message list previews up to five lines of an email. You can specify the number of lines in Preferences.
4 On mute
Mail allows you to mute replies to conversations so you don’t get a notification when new ones arrive.