diff --git a/app/src/main/java/eu/faircode/email/AdapterMessage.java b/app/src/main/java/eu/faircode/email/AdapterMessage.java
index 3bf635d5f8..22a988d66b 100644
--- a/app/src/main/java/eu/faircode/email/AdapterMessage.java
+++ b/app/src/main/java/eu/faircode/email/AdapterMessage.java
@@ -4581,7 +4581,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             boolean canBlock = false;
             if (message.from != null && message.from.length > 0) {
                 String email = ((InternetAddress) message.from[0]).getAddress();
-                canBlock = !TextUtils.isEmpty(email) && Helper.EMAIL_ADDRESS.matcher(email).matches();
+                canBlock = !TextUtils.isEmpty(email);
             }
 
             Bundle aargs = new Bundle();
diff --git a/app/src/main/java/eu/faircode/email/FragmentMessages.java b/app/src/main/java/eu/faircode/email/FragmentMessages.java
index 1692071563..81c058cd42 100644
--- a/app/src/main/java/eu/faircode/email/FragmentMessages.java
+++ b/app/src/main/java/eu/faircode/email/FragmentMessages.java
@@ -2482,7 +2482,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
             boolean canBlock = false;
             if (message.from != null && message.from.length > 0) {
                 String email = ((InternetAddress) message.from[0]).getAddress();
-                canBlock = !TextUtils.isEmpty(email) && Helper.EMAIL_ADDRESS.matcher(email).matches();
+                canBlock = !TextUtils.isEmpty(email);
             }
 
             Bundle aargs = new Bundle();