OlivierF Hi, we use sendgrid to send our email campaigns via Acymailing 7. I don't really understand how the bounce system works. Example, we send a campaign : a user is not confirmed on acymailing. The use history is empty. On sengrid, an email has been sent and is on bounce. Check my screenshot : https://www.screencast.com/t/RFEy9Nq8WN https://www.screencast.com/t/nFirLaDoxpV So, why it send an email to an email adress not confirmed and why if it was bounced on sendgrid, it's not bounced on acymailing ??? Thanks ! Olivier