Giving up for today. I think I reached a SMTP email limit and that's causing failures elsewhere related to TCP connections. I'll look into it tomorrow. Thank you for all the feedback!
There were 5000+ successful logins! I think I need a better SMTP email provider and a way to make sure a failure doesn't crash everything else.
There were 5000+ successful logins! I think I need a better SMTP email provider and a way to make sure a failure doesn't crash everything else.