Hi @darkpollo,
Thanks for this message. The Stop Emails plugin works by overriding the WordPress mail sending code. Other plugins, like SendGrid, also override the mail sending code but so they can send the message instead. Their overrides allow the messages to be sent through their service despite the presence of the Stop Emails plugin.
Based on your report, I’ve added **SendGrid** to the list of Known Incompatible Plugins.
While I’ve considered adding specific code to target these incompatible plugins one-by-one, ultimately I’ve decided that would be a larger time investment than I can give to this plugin.
If you or someone else has an improved way to prevent emails from sending (without addressing each other plugin individually), I’d love to hear about it.
In summary, I like the idea of stopping emails for these incompatible plugins but I’m concerned trying to addressing them individually would turn into a never-ending game of Whac-a-mole.
I’m sorry I don’t have a more satisfying reply to your request.