Have the single input NCD contact closure relay configured and I made an email account for this to run off of. It has a flashing green light in run mode and briefly flashes blue when the input is detected. Have not been able to successfully send an email. I have tried multiple different emails including yahoo, gmail, and outlook, with no luck. Have used ports 587, 25, and 465. Based off of what I see when I log into the accounts on my PC it does not show that any emails were even sent.
For Gmail you must Enable less Secure Apps.
Try that and see what you find.
I had that turned off on the first gmail account and it locked up that account. Created a new gmail for it and turned on “allowing less secure apps” before trying to log in through the relay and it worked perfect. Thanks!