Thunderbird - whitelist email from GlowHost

First of all, please ensure to mark messages from GlowHost as not spam:

1. Navigate to the spam folder.
2. Find the email from GlowHost and mark it as not spam by clicking on the fire icon.
   
   

Now, when email was marked as not spam, please add GlowHost email to contacts. This should help getting rid of emails being sent to spam.

1. Click on the sender at the header of the email.
2. Click Add to address book.

Thats all. Emails should be delivered directly to the inbox folder since now.