Fabriq

L’occitane case

The server [email protected] responded with error 5.1.10 which means that the latter accepted the email then rejected it because the recipient was not found. Which also explains why the email was sent without it being bounced to other persons at the same company & with the same email pattern.

When the server is ACCEPT ALL / CATCH ALL

The mail server could:

• accept the email and deliver it to the recipient
• directly reject the email, in this case gmail will send an error
• accept it, and then reject it & in this case the recipients mail server will send an error

prod.protection.outlook.com

550 ERROR : (Check the MX record)

• 5.1.1 : the recipient email server believes that the email address does not exist at the destination domain, and therefore has no way to deliver it.
• 5.1.10 : The recipient's email address doesn't exist or couldn't be found
• 5.4.1 : The email server that's generating the error doesn't accept email from the sender's domain @usefabriq.com
• 5.7.0 → 5.7.999 : security setting in the sender's organization or the recipient's organization is preventing the message from reaching the recipient