diff --git a/UI/Input/ValidatedTextField.ts b/UI/Input/ValidatedTextField.ts
index 15fe25b7eb..9976ca3887 100644
--- a/UI/Input/ValidatedTextField.ts
+++ b/UI/Input/ValidatedTextField.ts
@@ -733,6 +733,7 @@ class EmailTextField extends TextFieldDef {
         if (str === undefined) {
             return false
         }
+        str = str.trim()
         if (str.startsWith("mailto:")) {
             str = str.substring("mailto:".length)
         }
@@ -743,6 +744,7 @@ class EmailTextField extends TextFieldDef {
         if (str === undefined) {
             return undefined
         }
+        str = str.trim()
         if (str.startsWith("mailto:")) {
             str = str.substring("mailto:".length)
         }