Let me get the coffee pot put back on... > void err_realrcpt() { out("550 sorry, no mailbox here by that name (#5.1.1)\r\n"); } Sorry about that... RFC2821 4.2.3; 550 Requested action not taken: mailbox unavailable (e.g., mailbox not found, no access, or command rejected for policy reasons) RFC1893 3.2; X.1.1 Bad destination mailbox address The mailbox specified in the address does not exist. For Internet mail names, this means the address portion to the left of the "@" sign is invalid. This code is only useful for permanent failures. Tonix wrote: > I've developed a patch for qmail-smtpd with vpopmail, for rejecting non > existing users/aliases/mailing lists. > > This patch is now working nice on my system since more than 2 months, so I > think it's pretty stable and I may submit it to the community. > > The patch is freely available to everyone want to use it. > > The address of the HTML page for this patch is: > http://www.interazioni.it/qmail