diff --git a/mail/smtp.go b/mail/smtp.go
index c2a93cb4..29ed5552 100644
--- a/mail/smtp.go
+++ b/mail/smtp.go
@@ -461,7 +461,7 @@ func (a *loginAuth) Next(fromServer []byte, more bool) ([]byte, error) {
 		case "Password:":
 			return []byte(a.password), nil
 		default:
-			return nil, errors.New("Unkown fromServer")
+			return nil, errors.New("Unknown fromServer")
 		}
 	}
 	return nil, nil