Not Receiving OTP Email

I am not receiving One Time Password or authentication emails from some websites (e.g. WOL.Club).  This is definitely an xfinity issue. I'm not going to bother going through all the endless troubleshooting steps that are ubiquitously documented on these boards by dozens of other users experiencing the same issue. 

Why does outlook and gmail addresses instantly receive MFA, OTP, etc email, but as usual receiving these email to my Xfinity email address they are slow, delayed, or never even show up.

JUST FIX IT!