Hi, I need to block sending emails to domains like hotmal, gmail or yahoo, both ways full server and/or special users. any help?.
It might be possible to do this with smtpd_helo_restrictions: http://www.postfix.org/postconf.5.html#smtpd_helo_restrictions
Ok, I'll check and let you know, our ISPconfig server is working online succesfully since today, great soft guyz.