Or maybe you are using rich text formatting when composing messages anyway, so links should look like they do on web sites as well. In either case, turning text into a clickable link in your emails may not be obvious in Mail, but it is easy.
Insert a Link in an Email with Mac OS X Mail
To insert a link in an email with Mac OS X Mail:
- Make sure the message you are composing uses rich text.
- If it is not, Format | Make Rich Text is available in the menu. Use it.
- Highlight the part you want to turn into a link.
- Ctrl-click on the highlighted text.
- Select Edit Link... from the menu.
- Type or paste the address (URL) of the page you want the link to point at.
- Click OK.
Unfortunately, Mail does not place the link in the plain text alternative of the message. If you are not sure the recipient can and wants to read emails with rich HTML formatting, paste the link in the message body plainly instead, but make sure Mail does not break it.

