Update app.py

app.py

@@ -45,7 +45,14 @@ def format_zip(zip_code) -> str:
     if not z:
         return ""
     return z.zfill(5)[:5]
-
+    
+# Validate email format (must contain '@' and end with .domain)
+def validate_email(s):
+    s = clean_text(s)
+    if not s or not re.match(r"^[^@]+@[^@]+\.[a-zA-Z]{2,}$", s):
+        return ""  # blank out invalid emails
+    return s
+    
 def flow_address_lines(lines, maxlen=35, maxlines=3):
     """Word-aware wrap into up to 3 lines, hard-splitting very long tokens."""
     tokens = []
@@ -141,7 +148,7 @@ def build_ups_batch_no_header(file):
     out["State/Prov/Other"]      = to_str_series(df, "State")
     out["Postal Code"]           = zip_series(df, "ZipCode")
     out["Telephone"]             = to_str_series(df, "Phone Number")
-    out["Consignee Email"]       = to_str_series(df, "Email")
+    out["Consignee Email"]       = to_str_series(df, "Email").apply(validate_email)
 
     # Dimensions / weight
     out["Weight"] = to_num_str_series(df, "Weight")
@@ -166,7 +173,7 @@ def build_ups_batch_no_header(file):
     out["Reference 3"]           = to_num_str_series(df, "Customer Reference")
 
     # QV Notification flags/addresses
-    out["QV Notif 1-Addr"]       = to_str_series(df, "Email")  # recipient email
+    out["QV Notif 1-Addr"]       = to_str_series(df, "Email").apply(validate_email)  # recipient email
     out["QV Notif 1-Ship"]       = "1"
     out["QV Notif 1-Excp"]       = "1"
     out["QV Notif 1-Delv"]       = "1"