Hello, I made tests with mail addresses and I found something strange : when I send a mail to a user who is not in the site's users, the mail is arriving in the good mail box. I searched in the forum and I think this is file that modify addresses : /etc/postfix/virtusertable. I looked and I have a question There are strange lines, for example : email@example.com and I would like to know if I can delete them. Or ISPConfig will modify the file automatically again? Thanks for your answers.