Of course, sending is not hard either: click Send. Now, making sure the recipient also sees the image where you intend it to be... but no, that's not difficult either. It's good to know what you have to keep in mind, though.
Insert an Image Inline in a Message with Mac OS X Mail
To send a picture or graphic inline in an email with Mac OS X Mail:
- Make sure the message you compose uses rich text formatting.
- Select Format from the menu and choose Make Rich Text if available.
- Drag and drop the desired image from a Finder window to the desired place in the message.
- Alternatively, position the cursor where you want the image to appear and select File | Attach File... to insert the image.
- In Mac OS X Mail 3 and later, you can also click Photo Browser in the message's toolbar and select from your iPhoto collection.
- Make sure you use any kind of text formatting in the message. It's enough to explicitly assign black to some text by selecting Format | Show Colors from the menu.