Write your message and once done, you can either close the window to save your message as a draft or send it by clicking on the icon below:
If your Mac is not connected to the internet, Mail will automatically save your message in the outbox and automatically forward the latter once the connection is restored.
How to read an email?
Mail will automatically and regularly check for new emails, but if you are expecting an important email, click on this button:
How to respond to an email?
To reply to a message, click on the arrow below:
If the email was addressed to multiple recipients and you want to reply to all, click the double arrow:
To send the message, click:
To forward the email to another recipient, click on:
If you want to attach a file or image to your mail, you can eithe drag and drop the latter to the body of the mail, or you can click on the icon below:
To open an attachment, double-click on it or click "File> Save Attachments".
The Annotate feature
The "Annotate" feature appeared on Yosemite. It allows you to draw or write annotations directly on a file attachment.
Add an attachment to your email.
Mouse over the file and click on this below icon:
Click on "Annotate".
A toolbox will then appear, with 4 tools (sketch, shapes, text and signature) and a color palette.
Mail automatically group all the e-mails you exchange with the same contact in a conversation. This greatly facilitates sorting and monitoring of your emails.
The Mail Drop is a feature exists only on Yosemite. It allows you to send large files (up to 5Gb) via iCloud:
The Mail application will automatically load your file in iCloud.
NB: If your recipient does not use Mail, he will receive a download link.
Organizing your mailbox
You can create different mailboxes to store and organize your messages (work, personal, friends, family, etc ...):
How to create an additional mailbox:
Mailbox > "New Mailbox".
In the window that opens, choose the location of your new mailbox.
Follow the onscreen instructions.
Search in Mail
You can perform searches by keyword, name, title etc .... Which can be useful, especially if you do not remember the name of the sender, or if you are looking for a specific item or attachment. The search can be applied to one or more mailbox.