Email addresses are not posted in the directory to protect members, but you CAN send messages to them through the site (which they will receive by email.
Find them in the directory... click on their profile... then click their Contact tab. Of course you must be logged in to do this.
If you do not see a Contact tab like the above, then the owner of the profile you are using has not verified their account yet.
If you need to change the email address that is in your profile, please contact the front office.