Go to webmail.deltatechnicalservices.com and log in using your email address and password.
Optionally you can go to
http://webmail.YOURDOMAIN.COM where YOURDOMAIN.COM is your domain. Login using your email address and password.
The only difference between these two is...
Your domain may be easier to remember and/or easier to type. They both go to the same place.
Still not sure which to use?? We recommend the first one.. webmail.deltatechnicalservices.com