Mark Heschel as a Safe Sender!
To whitelist an email address just means you add them to your approved "safe" senders list. This tells your email client that you know this sender and trust them, which will keep emails from this contact at the top of your inbox and out of the junk folder. Whitelisting leads to improved deliverability, ensuring emails will land in your inbox every time. It is a quick, one-time-only task to ensure the sender of an email gets added to the recipient’s address book or safe senders list. Usually, all you need to do is open an email message and verify the sender can be trusted!
Add the following email addresses as safe senders!
cmail19.com (as a domain - add this by creating a new contact)
To find emails from these domains you can simply search your inbox for an email where they are the sender.