diff --git a/apis/management.cattle.io/v3/alerting_types.go b/apis/management.cattle.io/v3/alerting_types.go
index 0b7bfa67..ea62ed3b 100644
--- a/apis/management.cattle.io/v3/alerting_types.go
+++ b/apis/management.cattle.io/v3/alerting_types.go
@@ -133,7 +133,7 @@ type Notification struct {
 }
 
 type SMTPConfig struct {
-	Host             string `json:"host,omitempty" norman:"required,type=dnsLabel"`
+	Host             string `json:"host,omitempty" norman:"required,type=hostname"`
 	Port             int    `json:"port,omitempty" norman:"required,min=1,max=65535,default=587"`
 	Username         string `json:"username,omitempty"`
 	Password         string `json:"password,omitempty"`