We are aware of an issue affecting the delivery of some emails sent to Office 365 addresses. Specifically, emails sent from one of our IP addresses (3.19.87.175) have been temporarily blocked by Microsoft's email security system.
We have already submitted a request to Microsoft to have this block removed and are actively working to resolve the issue as quickly as possible.
Please note that this situation does not indicate any security or spam problem with our services. It is a standard part of how large email providers manage incoming traffic to protect their users, and occasionally, even trusted IPs can be affected.
We appreciate your patience and understanding. If you have any questions or experience further issues, please feel free to contact our support team.
Thank you for your continued trust in us.