Stop only scans your emails for senders, not content. We never access or store any of the content of your emails in any form whatsoever. Your emails are yours forever and always and that is our number one priority. For more details on permissions and privacy, check out our Security page.
Stop filters through mass mailers as well as any sales or cold emailers. You know that friendly “Let’s chat” email from a salesperson you’ve never heard of? Yeah, Stop blocks those emails and then identifies that bad actor's domain to block their emails as well as any other senders from that same domain.
Don’t worry about it. If an email is accidentally marked as spam, you can move the message back to your inbox and you'll continue to receive emails from that domain - as if nothing ever happened. We recommend checking your spam and junk for the first 1-2 weeks after connecting Stop to your account