Hi,
Trying to user this plugin HTML Mailer with Sendgrid or Gmail Plugin | Bubble
Getting this error
Have verified the sender in sendgrid
Can you please double check on your end that this plugin is still working?
Thanks
ZubairLK
Thanks for reaching out. Unfortunately, this error happens when you don’t verify the Sender email or perhaps your API key is not set up properly. You can try our editor key with this email example: zqdevelopment@yandex.com on your side, for testing purposes.
Please make sure when you create your Sendgrid account, you confirm your email and then create your API key here:
When done, just copy and paste it into Plugins Tab for both live and dev fields. Make sure it is your actual API key and not your API key ID.
Then you can create your Senders and validate them here:
By using a Single Sender for testing purposes.
Best,
Alex
domain was already authenticated.
rotated the keys and it started working again.
I suspect it is to do with something about sendgrid/twilio and 2fa policy changes
Thanks @zubair.lutfullah for feedback.
I’m glad it’s working on your side. If you like our plugin so far, could you please rate it by going to Plugins tab in Bubble editor? You can find the plugin by name and give it as many stars as it deserves. The more feedback we get, the more motivated we are to build great plugins 
Thanks!