forgot to ask is possible to delete this thread, to avoid spamming, ???
No need to delete the thread. A message to a moderator requesting to delete the inappropriate content (in this case your email address) will suffice and a moderator will delete the email address. You can do so by clicking on the "report" button just over your original post.
If you wish to close a thread created by you, all you need to do is select an answer posted by a member as the 'best answer'. A moderator will then mark the thread as 'solved' and close it.