To email a link directly to a corresponding agenda simply click into your list of Agendas, find the relevant agenda, and click the downward arrow/triangle drop-down to the right of this. From that menu select Email Link
A new pop-up window will open where you can select a user to email the agenda to, or select a group which will pre-populate the 'To' field for this email with all members of this group. (You can then remove any group users who you do not wish to receive it.)
You can add a message to this email should you desire.
When this has been completed successfully, click Send.
The recipients will then receive the email where they can read your message and click on the link to bring them to the agenda.