Hello Thomas, Thank you for your answer.However it doesn't work because "from domain..." is an invalid syntax
Le mercredi 5 avril 2023 à 11:33:09 UTC+2, Thomas Bohl <opensmtpd-misc-64...@aloof.de> a écrit : Hello, > So I would tend to write a rule such as > match ! from domain <domaines> for domain <domaines> action TO-CLAM_SMTPD_IN > Considering that users that write from mydomain2.org to mydomain1.org > match the first rule since they are local or authenticated or coming > from one of the known IPs. > But this rule is not correct Hm, maybe like this (untested): match !auth from domain <domaines> for domain <domaines> reject (Remember, first match wins. So it should be before match from any for domain <domaines> action TO-CLAM_SMTPD_IN)