The following technical requirements must be met for the operation of Z1 SecureMail:
Own mail server, alternatively Microsoft 365 or Google Workspace packages with mail function and PORT 25 sending option.
Own email domain with access to DNS configuration for domain validation in the certificate reference
Virtual server with dedicated line to the Internet or fixed IPv4 address
e.g. bookable with Hetzner or IONOS.
The configurations of the packages depend on the load.
Z1 SecureMail ONE sample configuration
for 50 users and average email size of 200 kB
Minimum 8 GB RAM, 2 CPUs, 80 GB storage