Ultimately, and most importantly, I would like to note that each email service has its own spam filters and message delivery criteria. When your messages are sent from our server to any external email service, they are an external and not a local delivery to it, meaning that it will go through their spam filters and message delivery validation before determining whether the message would then go to the recipient's Inbox or Spam. We are only able to ensure that your messages will be sent from our server to the servers of the recipients. From there, there are many external factors that will serve to determine if the respective message will land in the Inbox or the Spam, and these are factors that we can not control on our end, unfortunately.

As my colleague Dimithur kindly explained previously, we are a hosting provider, and email services that comes included for free with all of our hosting environments is considered a complementary service, due to which it is not expected to match the level of service that a dedicated email service provider would. This especially applies to clients that intend to use emails for marketing and advertising purposes related to their businesses as well as sending bulk email. The most that we can do on our end in order to ensure the utmost email deliverability possible for our clients is to use a third-party service such as SpamExperts that would force outgoing messages to be sent from their IPs, otherwise, if SpamExperts was not present, all clients that reside on the server would have to use the same default IP of the server to send messages, and this would essentially lead to very poor reputation and blacklists on it rather quickly.