diff --git a/email_handler.py b/email_handler.py
index 4fa9a21e..59e8925a 100644
--- a/email_handler.py
+++ b/email_handler.py
@@ -1853,22 +1853,26 @@ def handle(envelope: Envelope) -> str:
     # case where From: header is a reverse alias which should never happen
     from_header = get_header_unicode(msg["From"])
     if from_header:
-        _, from_header_address = parse_full_address(from_header)
-        if is_reply_email(from_header_address):
-            LOG.e("email sent from a reverse alias %s", from_header_address)
-            # get more info for debug
-            contact = Contact.get_by(reply_email=from_header_address)
-            if contact:
-                LOG.d("%s %s %s", contact.user, contact.alias, contact)
+        try:
+            _, from_header_address = parse_full_address(from_header)
+        except ValueError:
+            LOG.d("cannot parse the From header %s", from_header)
+        else:
+            if is_reply_email(from_header_address):
+                LOG.e("email sent from a reverse alias %s", from_header_address)
+                # get more info for debug
+                contact = Contact.get_by(reply_email=from_header_address)
+                if contact:
+                    LOG.d("%s %s %s", contact.user, contact.alias, contact)
 
-            # To investigate. todo: remove
-            if TEMP_DIR:
-                file_name = str(uuid.uuid4()) + ".eml"
-                with open(os.path.join(TEMP_DIR, file_name), "wb") as f:
-                    f.write(msg.as_bytes())
+                # To investigate. todo: remove
+                if TEMP_DIR:
+                    file_name = str(uuid.uuid4()) + ".eml"
+                    with open(os.path.join(TEMP_DIR, file_name), "wb") as f:
+                        f.write(msg.as_bytes())
 
-                LOG.d("email saved to %s", file_name)
-            return status.E523
+                    LOG.d("email saved to %s", file_name)
+                return status.E523
 
     if rate_limited(mail_from, rcpt_tos):
         LOG.w("Rate Limiting applied for mail_from:%s rcpt_tos:%s", mail_from, rcpt_tos)