My site has mysteriously stopped sending any kind of emails - login/registration/forgot password
It was sending when I checked last time 1.5 months ago.
I checked with DigitalOcean, where its hosted, they say - maybe some ports related to my email provider are not open in my firewall settings.
My question is - what could have changed recently which could affect the email delivery now, since emails have been working earlier since previous 6 months without any such issues.
I am not quite understanding either the (possible) issue or fix, since I made NO changes from my side on any configuration.
PS: The issue is same before & after the upgraded to latest update on Jan 23.