To make a link that opens a new email message do the following:
Select the HTML text or graphic item you want to create the new email and open the Hyperlink dialog from the Edit menu or press Command-k
Click the External tab
Select mailto: from the Protocol pulldown
Add the recipients email address after mailto: in the large field in the center of the dialog
Click Ok
You should end up with something like this:
mailto:fred@example.com
You can easily add extra parameters to mailto: links, such as carbon copy (CC), blind carbon copy (BCC), reply to, subject and even the message itself.
More recipients can also be added by using a comma to separate them. For example an email to fred@example.com and jane@another.com would look like this:
mailto:fred@example.com,jane@another.com
To carbon copy Jane instead of sending it to her, a parameter could be added to the end of the address by using a ? character and adding the name of the parameter (cc in this case) and an = character.
mailto:fred@example.com?cc=jane@another.com
To blind carbon copy Jane then the cc can be replaced for a bcc:
mailto:fred@example.com?bcc=jane@another.com
Notice that the first extra parameter added is proceeded with a ? character. Any further parameters will need to be separated with an & character. To add a reply to address add "&reply-to=" to the end of the link: