Qurl.net is currently disabled due to links mostly being made by spamming assholes.
Qurl.net is not a spamming service, and better it die than be abused like this.
If you really want them to stop, bug your ISP to enable SPF (Sender Policy Framework) support, and to reject on SPF FAIL.
And stop replying to spam, you idiots; if you keep doing that, you'll end up getting more!