IPv6 5 June 2014

Case Study: SMTP over IPv6 at LinkedIn

Popular social networking site LinkedIn has a dual stack IPv4 and IPv6 network. They wanted build on that by deploying email over IPv6 using the Simple Mail Transport Protocol (SMTP). By being early in deploying SMTP for IPv6, LinkedIn hopes to set the tone for how IPv6 and email will play out between operators.


Important in any SMTP deployment is spam prevention. Porting IPv4 spam mitigation techniques to the IPv6 world requires careful planning. Technologies such as Sender Policy Framework(SPF), Domain Keys Identified Message(DKIM) and IP blocking lists sometimes require different thinking in the IPv6 world. Check out their write up and accompanying slide show presented at the 2014 IPv6 World Congress which explains many of the issues and solutions that deploying IPv6 over SMTP raises.

Please visit our IPv6 Case Studies page for more examples of IPv6 deployment. If you would like to get started with IPv6, please visit our IPv6 resources or begin with our “Start Here” page to help find resources most appropriate for your type of organization. If you have an IPv6 case study you think we should consider for inclusion on our site, please contact us – we are always looking for more!

Related articles

Deploy360 1 March 2019

IPv6 Security for IPv4 Engineers

This document provides an overview of IPv6 security that is specifically aimed at IPv4 engineers and operators. Rather than...

Deploy360 27 February 2019

IPv6 Security Frequently Asked Questions (FAQ)

Executive Summary The Internet Society recognises that global deployment of the IPv6 protocol is paramount to accommodate the present...

IPv6 6 June 2018

State of IPv6 Deployment 2018

IPv6 deployment continues to increase around the world. In the six years since World IPv6 Launch levels...