-- UPDATE 10:41 PM EST 27/04/2020 --
Our team has managed to resolve the IP reputation issue, and at this time no further mail delivery failure has been reported.
We are and will continue to monitor mail delivery activities in the meantime. Thank you for your patience and please don't hesitate to reach out to support if you are encountering related issues or have any further concerns.
Our Server Health team is currently investigating email delivery problems affecting our Shared Hosting services, which includes Optimized Wordpress & Reseller hosting.
We are looking into reported IP reputation issues with our mail relay system and during this period some emails might fail to be delivered and bouncebacks are generated.
We sincerely apologize for the inconveniences caused, and will provide further updates as soon as we have more information.