Attached files not sending: temp cleanup too quick

Hi, I have an issue with attachments sometimes not sending because the temp file cleanup routine runs before the form is submitted.

The timeout is 60 seconds and is hard-coded into function wpcf7_cleanup_upload_files.

I’ve fixed the issue on the site temporarily by removing this function from the template_redirect hook.

Would it be possible to add a filter to the plugin for this value, so that site developers/maintainers can customise it?

Thanks.