Erik, please contact me offlist with details (IP block, etc.). We'll shake the tree for you. Anne Anne P. Mitchell, Attorney at Law CEO/President, SuretyMail Email Reputation Certification and Inbox Delivery Assistance GDPR, CCPA (CA) & CCDPA (CO) Compliance Consulting http://www.SuretyMail.com/ http://www.SuretyMail.eu/ Attorney at Law / Legislative Consultant Author: Section 6 of the CAN-SPAM Act of 2003 (the Federal anti-spam law) Author: The Email Deliverability Handbook Board Member, Board of Directors, Denver Internet Exchange Board Member, Board of Directors, Asilomar Microcomputer Workshop Legal Counsel: The CyberGreen Institute Legal Counsel: The Earth Law Center Ret. Professor of Law, Lincoln Law School of San Jose

On Feb 17, 2019, at 11:01 PM, Erik Zhu <erik.zhu@uniserveteam.com> wrote:

Hello All,

Does anyone know the best way to get connect to Craiglist technical support regarding the blocked IP ranges. We are an ISP in Canada, and since early this year we noticed that most of our IP blocks are blocked on some of the Craigslist's servers. One easy example is finding any items on Craigslist, hit reply, and gives an error "Sorry, something went wrong", the web analyzer indicates status code 403 forbidden.

I understand that if individual subscriber IP could be automatically blocked due to certain reasons by Craigslist, but I don't know why our entire IP blocks could be blocked, even some IP ranges are never assigned to any active services.

Did anyone have the encountered the same issue before, how can we get it resolved?

Thanks,

Erik