un-named attachment

Hi

I’m getting the following error:

{htmlspecialchars(save_attachments_worker: un-named attachment)}
{htmlspecialchars(save_attachment: generating file name)}
{htmlspecialchars(save_attachment: pre sanitize file name ‘5ec1a62b907b1’)}
{htmlspecialchars(save_attachment: file name ‘5ec1a62b907b1’)}

I’m using gmail + python to send the emails. I believe that I’m creating the cid correctly. The cids are in arabic if that matters at all. Any idea what might be the issue? is it related to postie?

Thanks!