The Tucows engineering team have been performing multiple recovery and repair steps. They are in the final phase of this process. Upon completion, they will begin the final steps to bring the mail services back online.
Again, we apologise for the inconvenience this is causing our customers. This is being worked on as an absolute priority and we will continue to keep you updated on progress. A full Root cause analysis will be provided to all affected customers once service has been fully restored.
As a workaround, clients are still able to send and receive emails from their account(s) via webmail. Please use the following link for the knowledge article explaining how to do this.
Unfortunately, access to your old emails is only possible if you have previously configured and accessed your emails via any mail client (such as Outlook, Mail, Thunderbird, etc.) but, you will not be able to send/receive from your client at this time.