Just following up on this request. I still think 'Block Sender' is not needed because spammers don't re-use addresses. But if you can't remove it, at least make it work like Gmail's block sender dialog:
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Block this email address
Future messages from Mr Zakir Hossain <mrzakirhossain444@gmail.com>
will be marked as Spam.
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The SmarterMail dialog below 1) doesn't tell the user what's going to happen with future messages, 2) doesn't have a cancel option in case user doesn't want to proceed, and 3) sets up a rule that permanently deletes messages instead of using Deleted Items or Junk.
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Message
You have blocked mrzakirhossain444@gmail.com
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