Naturally, we have limited control over something like this, but we do investigate all such Reply To addresses to evaluate whether the subscriber is the true sender of the spam. Please report spamming incidents. One popular technique involves using specially-designed software to randomly generate email addresses for specific domains. The spam email will be sent to all of these addresses that are generated, with the likelihood that some will be valid. These valid addresses can then be sold to other bulk emailers, and the cycle continues.
Many people are under the assumption that a 'remove request' stops additional emails.
However, responding to spam email only provides proof to the spammer that the email address is valid, and most likely will NOT result in removal from the list. We prefer that it not be forwarded as an attachment as attachments may not be opened due to possible virus contamination.