diff --git a/app/src/main/java/eu/faircode/email/Helper.java b/app/src/main/java/eu/faircode/email/Helper.java
index a726206bec..812c5d118e 100644
--- a/app/src/main/java/eu/faircode/email/Helper.java
+++ b/app/src/main/java/eu/faircode/email/Helper.java
@@ -195,7 +195,7 @@ public class Helper {
     static final Pattern EMAIL_ADDRESS = Pattern.compile(
             "[\\S]{1,256}" +
                     "\\@" +
-                    "[\\p{L}][\\p{L}0-9\\-\\_]{0,64}" +
+                    "[\\p{L}0-9][\\p{L}0-9\\-\\_]{0,64}" +
                     "(" +
                     "\\." +
                     "[\\p{L}0-9][\\p{L}0-9\\-\\_]{0,25}" +