Hello. Do you own a Directadmin license or are you a hosting customer.
If you are a hosting customer, please contact your host next time for support. This forum is for support to admins (and resellers) only.
For now to help you, you can use an email client to read your mail.
Or you can login to webmail to read your mail.
Mostly this is via this link:
You're welcome.
If you used default Directadmin settings you could also use a mail client like Outlook or Thunderbird.
Mostly they will find the settings automatically, otherwise we can help you if it does not.