Final answer:
Accessing e-mail typically utilizes the Von Neumann architecture, which stores programs and data in the same memory and uses the same bus, common in general-purpose computers.
Step-by-step explanation:
When accessing your e-mail, you are predominantly using a computer that operates on the Von Neumann architecture. This architecture is characterized by a design where the data and program are stored in the same memory and are treated the same in terms of access through the same bus. This approach is predominant in general-purpose computers, which are used for a multitude of tasks, including checking e-mail.
In contrast, the Harvard architecture is a computer architecture with physically separate storage and signal pathways for instructions and data, which is less common in general-purpose computers. The RISC (Reduced Instruction Set Computer) and CISC (Complex Instruction Set Computer) architectures refer more to the type of processor design in terms of instruction sets rather than the overall computer architecture and can both be based on the Von Neumann model. So when referring to e-mail access, it's best associated with a computer using Von Neumann architecture.