fix error logging

oser_backend/mails/signals.py

 """Mails app signals."""
 
 from django.dispatch import Signal, receiver
-from python_http_client.exceptions import HTTPError
 
 from logs import get_logger
 
@@ -29,7 +28,4 @@ def log_app_disabled(sender, subject, recipient_list, **kwargs):
 @receiver(failed)
 def log_failed(sender, exception, **kwargs):
     """Log an exception that occurred during a mail delivery."""
-    if isinstance(exception, HTTPError):
-        logger.exception(exception.read())
-    else:
     logger.exception(exception)