1 files changed, 4 insertions, 1 deletions
diff --git a/src/mailman/handlers/mime_delete.py b/src/mailman/handlers/mime_delete.py
index 14aee1a0e..4f1b08ac7 100644
--- a/src/mailman/handlers/mime_delete.py
+++ b/src/mailman/handlers/mime_delete.py
@@ -279,7 +279,10 @@ def to_plaintext(msg):
             try:
                 stdout = subprocess.check_output(
                     command, universal_newlines=True)
-            except subprocess.CalledProcessError:
+            except (FileNotFoundError,
+                    PermissionError,
+                    subprocess.CalledProcessError,
+                    ):
                 log.exception('HTML -> text/plain command error')
             else:
                 # Replace the payload of the subpart with the converted text