dstonek: > To make it simple please take a look at > https://serverfault.com/questions/959629/why-this-email-wasnt-delivered-by-postfix-dovecot-procmail > Thank you
According to the above link: Mar 22 06:36:21 host postfix/cleanup[12463]: D6D441CA09A0: discard: header x-microsoft-antispam-message-info:? 5rSUbtg9a+8v7qvflcvdu8ODNNDgy6QCo+...etc... According to Postfix header_checks documentation: DISCARD optional text... Claim successful delivery and silently discard the message. Do not inspect the remainder of the input message. Log the optional text if specified, otherwise log a generic message. Someone configured Postfix to discard this message. Wietse