As a service that specializes and takes pride in our email delivery rate, we at Adopia want to do everything needed, so that your mails land in the inbox. We do what we can on our end to help deliver your mails. However, There are a couple of steps that you can take that will aid us in the delivery of your mails:

1. If you make sure that their mailing list or lists that you have uploaded in Adopia are actual OPT-INs you have to a great extent, made sure that you are spam compliant. 

2. Actively monitoring and attending to subscribers support questions will greatly reduce your chance of mails being reported as spam, as well as avoiding any kind of future litigations.