Existing Customers
Following is a list of existing CA.mail customers (i.e., "Early Adopters").
| Alcoholic Beverage Control | Office of Administrative Law |
| Alcoholic Beverage Control Appeals Board | Office of the Chief Information Officer |
| Air Resources Board | Office of Homeland Security |
| Business, Transportation, andHousing | Office of Security and Privacy Protection |
| Calfed Bay-Delta Program | Office Of Systems Integration |
| California Enterprise Architecture Program | Office of Traffic Safety |
| California Film Commission | Placer County Department of Child Support Services |
| California Workforce Investment Board | Social Services, Department of |
| Child Welfare Services/Case Management System | State Council on Developmental Disabilities |
| Developmental Services, Department of | State and Consumer Services Agency |
| Employment Development Department | Technology Services, Department of |
Future Customers
Following is a list of customers who are interested in becoming early adopters.
| Department | Application | Mailboxes |
| Accountancy, Board of | Lotus Notes | 120 |
| Caltrans | Lotus Notes | 22,000 |
| Chiropractic Examiners, Board of | Exchange 2003 | 13 |
| Consumer Affairs | Lotus Notes | 2,500 |
| Corrections and Rehabilitation | Exchange 2003 | 23,000 |
| Developmental Services | Lotus Notes | 3,500 |
| Expositions and Parks | Exchange | 32 |
| General Services | Exchange 2003 | 4,500 |
| Justice | Groupwise | 6,200 |
| Mental Health | Groupwise | 5,000 |
| Public Health | Exchange 2003 | 5,000 |
| State Lands Commission | Groupwise | 225 |
| Victims Compensation | Exchange | 400 |