The easiest way to send friends mail is to look for their avatar in the friends bar at the bottom of page. On the bottom left of their pic is an envelope click, their name is already there. If not a friend you can click the envelope at the top right bar, click the ink and quill, click add info and send. To send a friend request go to friend bar bottom of page, to the far right click the plus avatar, click search, find who you want to add what you want and press send .

to send to all friends go to friends bar at bottom of page, click on elf avatar with plus sign (far right) use the envelope, write message and send to all will say friends circular mail.