Вы указали некорректную информацию о сервере:
I receive the following error when accessing via Outlook - Relaying not permitted.
To solve this, please do the following:
Here the server information should be as below:
Incoming: pop.mydomain.com
SMTP: smtp.mydomain.com
Account name: you must type your complete email address here, including the domain
When I login, I receive a similar error - "Can't open file: 'sometable.MYD'"
It is possible that the database on your server is corrupted. If this happens, please contact your Web Administrator and ask that the database be repaired.