I send newsletters from my Drupal 7 website using Simplenews. What I want is to add emoticons at the subject of the newsletter, like a Smiley or something like this.
Is it possible?
If you're talking text-based emoticon (e.g. ":)", ":D") then the answer is yes. If you're talking Unicode emoji-character based emoticons (e.g. 😊) then the answer is maybe. While Drupal sends out UTF-8 encoded emails, support for display of the emoticons depends totally on recepient's email client so your results will vary.