Are you using other reset password or registration plugin as it can be a plugin conflict why UMP reset password email can not be triggered? In that case, try activating “Override default WP emails” email from “User Meta >> Add-ons” and enable “Override email notifications”.
I do not user any other reset password or registration plugins.
It has been working flawlessly for a long time but now it does not anymore.
I just tried the override function from the Add-ons anyway: No change, unfortunately.
any additional diagnosis with the WP Mail SMTP plugin?
The WP Mail SMTP developer said they tested with the Free version of User Meta and had no issues.
Anything I can tell them in addition?