Each week, we send an email newsletter to our database. The US very consistently shows about 200ish "malformed links" in the email performance report. Each week we will see a similar amount.
Support has said that this is the result of something (automated or otherwise) messing around with the Marketo tracking links, but I was hoping someone could shed a bit more light on which email providers might be doing this, and if there is anything we can do. Since there are 200ish links, it's something like 10% of our weekly clicks in that week. I'd love to know where those people clicked.