email subsystem configuration (#50, #51)

controller/config.go

@@ -9,6 +9,7 @@ import (
 type Config struct {
 	Endpoint *EndpointConfig
 	Proxy    *ProxyConfig
+	Email    *EmailConfig
 	Store    *store.Config
 	Ziti     *ZitiConfig
 }
@@ -23,6 +24,13 @@ type ProxyConfig struct {
 	Identities  []string
 }
 
+type EmailConfig struct {
+	Host     string
+	Port     uint16
+	Username string
+	Password string
+}
+
 type ZitiConfig struct {
 	ApiEndpoint string
 	Username    string