Thank you for your question. The only email limitations are 50 recipients at a time, and 250 emails per hour.
You can request an increase, or exemption to this limitation in AMP.
Also, here is a link to our article on setting up your Mac Mail program, in case you need to check your settings.
We would need more information to provide a specific answer, such as the sending address. I recommend contacting live Technical Support, so they can review the logs in real-time when you send the newsletter.
If you have any further questions, feel free to post them below, or contact live Tech Support.
They are available 24/7 via:
Phone: 877-595-4482 x2
Chat (there is a link on the top right).
|Email:||support@WebHostingHub.com||Ticket:||Submit a Support Ticket|
|Chat:||Click To Chat Now|