It's your responsibility to add an unsubscribe link to your emails when needed. Emails that are promotional or include content that the recipient has not requested should always include an unsubscribe option.
If your recipients are unable to opt-out of future emails you send because you don’t add an unsubscribe option, your email may be flagged as spam. Having emails marked as spam could prevent your ability to send emails through Muck Rack in the future.
If you choose to include an unsubscribe link in your pitch, it will appear at the bottom of your email to every recipient.