I have confirmed access to the provided server, and I am familiarizing myself with your ticket request. While this ticket is being reviewed, we ask that you do not work on your server except in emergency situations, so as to not cause any conflicts. Please make sure to check your email in case we require access to any information that may assist us in resolving your issue. After a quick review, I noticed that the SPF record is set to soft fail ~all This will need to be adjusted as it appears the majority of the spam is due to people pretending to send on behalf of XXXXX.DZ and using different servers to do so. With a soft fail, this prevents most servers from denying the mail outright due to a lack of "permission checking" and the mail you are receiving is a result of the "bounces" because the server is not confirming or denying that it is permitted to send. For more information about SPF records, please refer to the link below. SPF records: Hard Fa...