Cru Policy on Bit.ly Links Prohibited Use Bit.ly URL shortener links are prohibited for any emails using Cru IPs in the sending process. Reason Use of Bit.ly links results in a "ReturnPath Certification" violation. Consequence Violations lead to Cru emails being blocked due to the lack of certification whitelisting. Check the Bit.ly Link Add a  +  to the end of any bit.ly link in your browser address bar (e.g.,  bit.ly/xxxx+ ) to preview the destination page and inspect the URL before navigating.