Solved! Go to Solution.
We're finding more and more of our recipients' email servers blocking the Marketo tracking domain as well - and not our own. It's more challenging than ever to reach our users' inbox.
Justin Cooperman - What I've seen and has been reported to me, is that the email tracking url (ie: mkto.marketo.com/agbwe0183gkbsdv) ends up either hanging indefinitely and not redirecting to the intended url (ie: pages.marketo.com/awesome-lp.html), or else there is some sort of firewall message saying the page is blocked. Very prevalent in China (they call this the"Great Firewall" or GFW)
We experienced this one as well with a campaign in China last month. We thought it was something configured on our own internal firewall in China (since we have stricter rules in certain countries). We fixed it for our internal users. But thanks for enlightening me on this more widespread/known issue, Ray Huang