We try as hard as we can to stop spammers. In cases like this there are usually many messages sent from the same person in a short period of time. We monitor this activity, and then ban the person from sending emails when we notice it.
The trouble is that this type of message is sent by a person, who created an account and manually typed in the message and the confirmation letters. Short of eliminating the contact form, we have no way of stopping this.
Another approach would be to create a private messaging system at Coroflot, and contact would run through the site rather than your email. That won’t stop this type of spam from happening, but it would kepp it out of your inbox.
Your feedback is welcome.