This person or Persons, may send you an email requesting help with an animail. Signed like this! Sincerely,
A Fellow Animal Lover.
When you reply back, you will receive an automated responce , saying "Due to the high amount of spam, they will request you to click on a link and fill out an application with your e-mail address, Thus possible allowing them to give your computer a virus and possibly getting all of your contacts from your address book.
Beware!