How can I get Xfinity's Attention regarding email connection timeout solution?

People are having issues regarding email connection timeouts that is most likely caused by something xfinity did arount 1/27.  I found a solution (change MTU), but I have no idea how to get xfinity tech support to read my solution and determine whether their changes are the root cause (other than spending hours on hold through 3 tiers of  useless tech support, which I refuse to do)

I can supply supporting capture data of it will help.

My solution is here:

https://forums.xfinity.com/t5/Email-Web-Browsing/connection-has-timed-out/td-p/3411054