Can I hire other companies to send bulk messages for me?
You can't hire other people to send messages that would violate our spam policy if the message mentions your website (or any other service) on our servers.
When people complain about spam they've received, they usually complain to both the operator of the server that the message was sent through and the operator of the website that's promoted in the message. We'd still get spam complaints about the messages, and other ISPs would still consider blocking our servers because we provide services to people who send unsolicited bulk mail, regardless of what server you use to send the messages.
Because of that, our spam policy prohibits sending unsolicited bulk messages through any server or company. If someone else sends messages on your behalf, you are liable for the other person's behavior. Make sure you don't (either intentionally or inadvertently) hire someone to send spam about your website.