One of our users uncovered an email issue that I tracked down and (I think) fixed today. If you have uploaded data in the past and received a message stating that there had been an SMTP error and that email notification had failed but upload had likely succeeded, you probably were a victim of this same bug. It occurred when you elected to not receive email confirmation of your upload and
used a Hotmail account (or account from another large email provider) for your user email address in the form. I always have email sent to me to notify me of submissions, but for uploads where the user didn't want email, I would set the originating email address as that of the user rather than as Switchbacks.com (in order to facility easy contact in case of questions). The system includes Hotmail and some other large domains on a list of potential spam abuse targets and was seeing this as spam originating from Hotmail. So, I fixed things to always
originate from Switchbacks.com and added the user email address as the "Reply To" address rather than the origin. Make sense?
Anyway, please let me know if you encounter any weirdness going forward. I've also added error logging to help track down any future issues.