We've recently discovered that in certain isolated cases our unsubscribe link doesn't seem to work. It appears that when a client receives our email the unsubscribe link is missing the "." before the html extension. So for example instead of "unsubscribe.html" it shows as "unsubscribehtml" which causes the URL to not work correctly. We've been troubleshooting this for several days now and can't seem to find an answer for it. Our email templates use the system token for the unsubscribe link and nothing on our Unsubscribe URL has changed. When looking in MKTO the URL works as intended, when sending myself test emails the URL works as intended. This just started happening maybe 2 weeks ago. I am wondering if someone else has had the same issue at some point or if someone has any idea on what's causing this and how to fix it. Any help is much appreciated!