Please change the mail.lua module to also mail caged pets.
I've made the change to my copy and find it very useful since I farm pets and want them mailed to my banker toon to resell.
Here is the code I added to Mail.lua at line 945 (just a suggestion).
local itemID = C_Item.GetItemID( location)
local itemName = GetItemInfo(itemID)
if (EMA.db.MailBoEItems == true) and (itemName == 'Pet Cage') then
canSend = true
toonName = EMA.db.autoMailToonNameBoE
end