Hi All, I already searching the forum, I can't find it, so is it possible to change the SMTP Error Message on Roundcube base on postfix configuration when i blocked user from sending and recieving from outside domain. Example: smtpd_reject_unlisted_recipient_message = "SMTP Error: [554] 5.7.1 You're forbid to send email" is it possible, TA MarzQ
