diff --git a/plugin/api/email/common/auth.go b/plugin/api/email/common/auth.go
new file mode 100644
index 00000000..a5c78301
--- /dev/null
+++ b/plugin/api/email/common/auth.go
@@ -0,0 +1,36 @@
+/* Copyright © INFINI Ltd. All rights reserved.
+ * Web: https://infinilabs.com
+ * Email: hello#infini.ltd */
+
+package common
+
+import (
+	"infini.sh/console/model"
+	"infini.sh/framework/core/credential"
+	"infini.sh/framework/core/elastic"
+	"infini.sh/framework/core/orm"
+)
+
+func GetBasicAuth(srv *model.EmailServer) (basicAuth elastic.BasicAuth, err error) {
+	if srv.Auth != nil && srv.Auth.Username != "" {
+		basicAuth = *srv.Auth
+		return
+	}
+	if srv.CredentialID != "" {
+		cred := credential.Credential{}
+		cred.ID = srv.CredentialID
+		_, err = orm.Get(&cred)
+		if err != nil {
+			return
+		}
+		var dv interface{}
+		dv, err = cred.Decode()
+		if err != nil {
+			return
+		}
+		if auth, ok := dv.(elastic.BasicAuth); ok {
+			basicAuth = auth
+		}
+	}
+	return
+}