Question : Is it normal to receive delivery status notifications?

Yes, this is normal. However, these notifications do not mean that the newsletter was not sent. Multiple reasons may be the cause for these returns (full mailbox, domain/server maintenance, incorrect address, etc.).  In these cases, the delivery system continues to retry sending the email for 48 hours. If the problem is not solved, the address will be classified as “badmail”. We recommend, if possible, dedicating an email address exclusively for emailing campaigns.