Change General preferences in Mail on Mac
Use General preferences in Mail to change options for checking for new messages, downloading attachments, searching and more.
To change these preferences in the Mail app on your Mac, choose Mail > Preferences, then click General.
Default email reader | The email app to use for your email. Mail is set by default. |
Check for new messages | When Mail gets new messages from the mail server. By default, the option is set to Automatically (Mail varies how often it gets messages based on whether your Mac is plugged into an electrical outlet). If you change the option to Manually, click the Get Mail button |
New messages sound | The sound to play when you receive messages. To sample a sound, click the pop-up menu, then choose a sound. |
Dock unread count | The mailboxes to include in the count of unread messages (the red circle, called a badge, that’s shown on the Mail icon in the Dock). The count appears only if “Badge app icon” is selected for Mail in Notifications preferences. To open Notifications preferences, choose Apple menu |
New message notifications | Display notifications when a message arrives in the selected mailbox. To be displayed, the alert style must be set to Banners or Alerts for Mail in Notifications preferences. To open Notifications preferences, choose Apple menu > System Preferences, then click Notifications. |
Downloads folder | The folder where attachments you save are stored. |
Remove unedited downloads | When to delete attachments temporarily saved in the Mail Downloads folder (in the Library folder of your home folder). By default, an attachment that you haven’t edited or saved is deleted when you delete the message that contains it. |
Add invitations to Calendar automatically | Automatically add invitations you receive in messages to the Calendar app. |
Automatically try sending later if outgoing server is unavailable | When the SMTP server is unavailable, Mail stores your messages in the Outbox and tries sending them again later. To have Mail show other servers that are available to send messages, deselect the tickbox. |
Prefer opening messages in split view when in full screen | When Mail is full screen, open messages side-by-side with the message list. (If you’re working with Mail and another app in Split View, messages open by sliding up from the bottom of the screen.) To always have messages slide up from the bottom of the screen, deselect the tickbox. |
When searching all mailboxes, include results from | Include messages from the Trash or Junk mailboxes, or encrypted messages, in search results. |
in the Mail toolbar to check for messages. (Whenever you click an IMAP or Exchange 
> System Preferences, then click Notifications.If you were using Mail plug-ins when you upgraded to macOS Mojave, click Manage Plug-ins to enable them again.