Object-oriented rule system 

The object-oriented rule system enables custom rules for your domains. Itīs an easy but very flexible way to define filter rules by user, domains, time frame, content type and resulting action.

• Who - object
  For TO and/or FROM Category
  Example: Mail object - Who is the sender or receiver of the e-mail?
• When - object
  Example: When is the e-mail received by Proxmox Mail Gateway?
• What - object
  Example: Does the e-mail contain spam?
• Action - object
  Example: Mark e-mail with "SPAM:" in the subject.

Every rule has got 5 categories (FROM, TO, WHEN, WHAT, ACTION) which can contain several objects. For example a virus protection looks like this:

• FROM: Anybody
• TO: Anybody
• WHEN: Always
• WHAT: Virus
• ACTION: Block

Options range from simple spam and virus filter setups to sophisticated, highly customized configurations blocking certain types of e-mails and generating notifications. This fexible architecture enables easy integration into your existing network architecture.

The commercial version offers a lot of powerful additional objects to configure a custom system.