Nanacast.com sends all Notification emails, and emails to the AWeber parser when syced with AWeber, in behalf of the Customer Service email address for your specific offer. AWeber and many other servers can filter out emails sent on behalf of another domain if that domain does not list approved domains in their SPF records.

Therefore, it is advised that if you have your own domain for email, you should update your SPF record where your DNS records are kept. (Note: If your Nanacast.com account email domain is different than the domain for the email provided for the Customer Service email, be aware that it's the domain of the Customer Service email that needs SPF record updated.) 

To add us to your SPF record: (using example.com as your domain and examplehost.com as your hosting provider)

1. Open your DNS settings for example.com
2. Go to the TXT records and edit the record that starts with v=spf1
3. Cut and past the following to replace the record: v=spf1 a mx a:nanacast.com ~all
   
4. Save settings, wait for the duration of your DNS TTL, and then test at mxtoolbox.com by clicking SPF Records at the top navigation bar and then typing example.com into the command box