Hi @FannyJustinGuitar , not sure if you’ve changed a DNS provider recently or maybe it’s some update on MailChimp. But the last email I received is failing domain authentication.
Just FYI. This can affect email deliverability.
Thanks for reporting this! I’ll flag it to the team. 
Cheers,
Fanny
Hi again!
Which platform / add-on is showing the pop-up message? Which email provider are you using? (ex: Gmail)
Thank you!
Fanny
Proton Mail