Your box can host mail for multiple users and multiple domain names.
It implements modern mail protocols (SPF, DKIM, and DMARC) and the latest security best practices, including opportunistic TLS, strong ciphers, and HSTS. When enabled, DNSSEC (with DANE TLSA) provides a higher level of protection against active attacks. Exchange ActiveSync is also available as a beta feature.
It has web based interface for administration and features RoundCube webmail as client. Really swiit 😊