One of my clients is getting thousands of "Delivery Status Notification (Failure)" emails per day and it's replied to random email accounts that don't exist on the domain. The content of the emails ...
When we send mail to Hotmail servers, they do not recognize our Sender ID. In the receiving mail source, it reads Authentication-Results: hotmail.com; sender-id=temperror ... when it should say pass ...
Which server do you recommend? (postfix?) Which configuration for authenticating users for sending mail? Which setups for making it inbox friendly (dkim, spf, domainkey etc)? Is there some detailed ...
When I started learning how to configure email, SPF existed but there were doubts about whether it was a good thing, and the value of offering SPF records in DNS. Now it seems that it is widely ...