postfix mails from non existing domain
 

today i think someone has hacked one of the email accounts with passwort from server.

problem, he sends phishing emails over the account with a not existing sender domain on server.
in logs i can only see the non existing sender adress, so i don't know from which account.

it would be better if the mailsystem checks the sender adress before sending as standart.

what i have to change to solve this problem?

thx
sascha

Hello,
Try check email logs by messageID