Content-Type: text/shitpost

Subject: Public service announcement about spamming
Path: you!your-host!ultron!grey-area!fpuzhpx!plovergw!shitpost!mjd
Date: 2018-02-23T11:06:28
Newsgroup: misc.you-might-be-a-spammer
Message-ID: <45397b8c4ad9804d@shitpost.plover.com>
Content-Type: text/shitpost

If you are sending unsolicited email messages that include a phrase to this effect:

Don't want emails from me anymore? Reply to this email with the word "UNSUBSCRIBE" in the subject line.

that means you are a spammer, and you should stop spamming.

If your response to this is “but the people I'm emailing might be very interested in what I have to say” then yes, you are still a spammer; that is what every spammer says and what every spammer has said in the entire history of spamming. And you should stop. You may be fooling yourself, but you are not fooling anyone else.