Jul 10, 2013 Apple use the word Mailbox instead of Folder. It’s confusing, but don’t be concerned all we’re doing here is making folders. In Apple Mail, you can create 2 kinds of folders; a Mailbox or a Smart Mailbox. A Mailbox looks and acts like most folders you’re familiar with. Mail can be moved in and out with no restrictions. A problem unique to Apple's Mail app is it's inability to properly synchronize folders on the server to folders on your Mail app. This doesn't occur on every installation of Apple's mail application, but if you are having a problem with where sent messages, trashed messages.
Mail User Guide
A Smart Mailbox displays email messages that are stored in other mailboxes and that meet certain criteria you specify. For example, a Smart Mailbox could include all the messages you receive about a specific project, regardless of which mailboxes the messages are stored in.
Tip: Mail provides a default Smart Mailbox named Today, which shows messages viewed during the current day. If you don’t see it in the Mail sidebar, move the pointer over the Smart Mailboxes section, then click Show.
Create Smart Mailboxes
In the Mail app on your Mac, choose Mailbox > New Smart Mailbox.
Use the pop-up menus and text fields to define the criteria for the mailbox, then click OK.
You can also copy an existing Smart Mailbox. Select it in the Mail sidebar, then choose Mailbox > Duplicate Smart Mailbox.
Edit Smart Mailboxes
In the Mail app on your Mac, select a Smart Mailbox in the Mail sidebar.
Choose Mailbox > Edit Smart Mailbox, then change the criteria.
Delete Smart Mailboxes
In the Mail app on your Mac, select a Smart Mailbox in the Mail sidebar.
Choose Mailbox > Delete Smart Mailbox.
The messages displayed in the Smart Mailbox remain in their original locations.
Create Smart Mailbox folders
If you have Smart Mailboxes, you can organize them into Smart Mailbox folders.

In the Mail app on your Mac, choose Mailbox > New Smart Mailbox Folder.
Enter a name, then click OK.
Drag one or more Smart Mailboxes into the folder.
When you view the folder, messages in all of the Smart Mailboxes the folder contains are shown.
If you change a message in a Smart Mailbox—such as marking the message as read or unread, or moving or deleting the message—the change is reflected in the mailbox where the message is stored.
If you use iCloud Drive, your Smart Mailboxes are available on your other Mac computers that have iCloud Drive turned on. See Use iCloud Drive to store documents.
Add your email account
If you don't have an email account set up, Mail prompts you to add your email account.
To add another account, choose Mail > Add Account from the menu bar in Mail. Or choose Apple menu > System Preferences, click Internet Accounts, then click the type of account to add.
- When adding an account, if you get a message that your account provider requires completing authentication in Safari, click Open Safari and follow the sign-in instructions in the Safari window.
- If necessary, Mail might ask you for additional settings.
Learn more about how to add or remove email accounts.
Send and reply
Learn how to compose, reply to, and forward email.
Send new messages
- Click New Message in the Mail toolbar, or choose File > New Message.
- Enter a name, email address, or group name in the 'To' field. Mail gives suggestions based on your contacts and messages on your Mac and devices signed into iCloud.1
- Enter a subject for your message.
- Write your email in the body of the message.
- To add an attachment, drag an attachment to the body of the message. Or choose File > Attach Files, choose an attachment, then click Choose.
- To change your font and format, use the options at the top of the message window.
- Beginning with macOS Mojave, it's even easier to add emoji to your messages. Just click the Emoji & Symbols button in the toolbar at the top of the message window, then choose emoji or other symbols from the character viewer.
- Send or save your message:
- To send, click the Send button or choose Message > Send.
- To save your message as a draft for later, close the message, then click Save.
Reply and forward
To reply to a single person, click Reply , type your response, then click Send .
To reply to everyone on a group email, click Reply All , type your response, then click Send .
- To forward a message to other people, click Forward , type your response, then click Send .
Organize and search
Sort your emails into folders and use multiple search options to find specific messages.
Create folders
You can create Mailboxes to organize your emails into folders.
- Open Mail, then choose Mailbox > New Mailbox from the menu bar.
- In the dialog that appears, choose the location for the Mailbox.
- Choose your email service (like iCloud) to access your Mailbox on your other devices, such as an iPhone signed into the same email account.
- Choose On My Mac to access your Mailbox only on your Mac.
- Name the mailbox and click OK.
If you don't see the mailboxes sidebar, choose View > Show Mailbox List. To show or hide mailboxes from an email account, move your pointer over a section in the sidebar and click Show or Hide.
Sort your emails
To move a message from your Inbox to a mailbox:
- Drag the message onto a mailbox in the sidebar.
- In macOS Mojave, you can select the message, then click Move in the Mail toolbar to file the message into the suggested mailbox. Mail makes mailbox suggestions based on where you've filed similar messages in the past, so suggestions get better the more you file your messages.
To delete a message, select a message, then press the Delete key.
To automatically move messages to specific mailboxes, use rules.
Search
Use the Search field in the Mail window to search by sender, subject, attachments, and more. To narrow your search, choose an option from the menu that appears as you type.
Add and mark up attachments
Attach documents and files to your messages and use Markup to annotate, add your signature, and more.
Attach a file
To attach a file to your message:
- Drag an attachment to the body of the message.
- Choose File > Attach Files, choose an attachment, then click Choose.
Use Markup with your attachments
You can use Markup to draw and type directly on an attachment, like an image or PDF document.2
- Click the Attach button or choose File > Attach Files in the message window.
- Choose an attachment, then click Choose File.
- Click the menu icon that appears in the upper-right corner of the attachment, then choose Markup.
- Use the Sketch tool to create freehand drawings.
- Use the Shapes tool to add shapes like rectangles, ovals, lines, and arrows.
- Use the Zoom tool in the Shapes menu to magnify and call attention to a part of an attachment.
- Use the Text tool to add text.
- Use the Sign tool to add your signature.
- Click Done.

Learn more
- Contact Apple Support.
Mac Mail Folders Don't Show Up On The Application
1. All devices signed into iCloud with the same Apple ID share contacts. Contacts addressed in previous messages that were sent and received on those devices are also included. To control this feature, turn Contacts on or off for iCloud. On Mac, choose Apple menu > System Preferences, then click iCloud. On iOS devices, go to Settings, tap your name at the top of the screen, then tap iCloud.
Mac Mail Folders Don't Show Up On The Apps
2. Markup is available in OS X Yosemite and later.