1. Configuration Web Service Windows SMTP Service (Gateway) SMTP Event Sinks Security Agent Configuration Web/Console UI DNS Responder Real SMTP Server Inbound, Outbound SMTP Msgs Email Clients MX, CERT Requests Human Admin Automated Admin XDD Gateway Inbound, Outbound XDD Msgs SMTP File DropPickup XDD Clients.NET R EFERENCE I MPLEMENTATION C OMPONENTS Monitor Service MDNs DNS Web Service SQL

2. Domains DomainName (string) AgentName (string) DomainID (auto) CreateDate UpdateDate Status Addresses EmailAddress (string) AddressID (auto) DomainID (FK) DisplayName Type ** CreateDate UpdateDate Status Administrators UserName AdministratorID (auto) PasswordHash CreateDate UpdateDate Anchors Owner * Thumbprint CertificateID (auto) CreateDate CertificateData ValidStartDate ValidEndDate ForIncoming ForOutgoing Status Certificates (private) Owner * Thumbprint CertificateID (auto) CreateDate CertificateData ValidStartDate ValidEndDate Status * Owner fields FK to either Domain.DomainName or Addresses.EmailAddress and inherit from domain to address. ** Addresses.Type is a free-text strings for use by implementations to manage routing. DnsRecords RecordID (auto) DomainName (FK) TypeID RecordData ValidStartDate ValidEndDate UpdateDate Notes C# Reference Implementation Configuration Schema Bundles BundleID (auto) Owner * Url CreateDate ForIncoming ForOutgoing Status Mdns MdnId MdnIdentifier MessageId RecipientAddress SenderAddress Subject Status NotifyDispatched CreateDate Policy Schema Linked by owner.

3. CertPolicies CertPolicyID (auto) Name (unique) Description Lexicon Data (binary) CreateDate CertPolicyGroupMap MapID (auto) CertPolicyGroupID(fk) CertPolicyID(fk) PolicyUse ForIncoming ForOutgoing CreateDate * Owner fields FK to either Domain.DomainName or Addresses.EmailAddress and inherit from domain to address. ** Addresses.Type is a free-text strings for use by implementations to manage routing. CertPolicyGroups CertPolicyGroupID(auto) Name Description CreateDate C# Reference Implementation Policy Configuration Schema CertPolicyGroupDomainMap MapID (auto) Owner * CertPolicyGroupID CreateDate