I am not receiving emails from certain senders who send through Mail Chimp or gmail. None of these senders are blocked. Can anyone help me?

To be honest, am not even sure what a whitelist is or where to find it. I cannot access any of the emails that I have not been receiving, though I know the senders.

This is a new issue for me.

Whitelisting an email would be adding it to your address book, @rotwood. Adding someone to your address book means those are trusted senders for your email account. This is the link to the Xfinity Connect Website, https://xfinityconnect.email.comcast.net/. Is that where you are checking for the emails? 

@XfinityRay​ 

An easier link:  https://connect.xfinity.com/appsuite

I do not have those senders in my address book. I will add them and see if that changes anything. Thank you.

You're welcome! Please let us know if it helps, rotwood!