Hello Gilles, When some spammer try to reach an invalid address in my server the log says "Invalid recipient":
[...] smtp failed-command command="RCPT TO: <NO@NO>" result="550 Invalid recipient: <NO@NO>" But, when the domain name part is valid (one of those included in my "vdomains" and "valiases" tables), it appears a "Mailing list expansion problem" message: [...] smtp failed-command command="RCPT TO:<NO@YES>" result="524 5.2.4 Mailing list expansion problem: <NO@YES>" In case what I assumed above is correct. :-) Is the "Mailing list..." message expected in this case? Walter # /etc/mail/smptd.conf egress_int="em0" server="server.roquesor.com" table "aliases" file:/etc/mail/aliases table "valiases" file:/etc/mail/valiases table "vdomains" file:/etc/mail/vdomains table "addresses" file:/etc/mail/addresses table "users" file:/etc/mail/users pki $server cert "/etc/ssl/server.crt" pki $server key "/etc/ssl/private/server.key" listen on lo0 listen on $egress_int port 25 tls pki $server listen on $egress_int port 465 smtps pki $server auth \ senders <users> masquerade action "local" mbox alias <aliases> action "virtual" mbox virtual <valiases> action "relay" relay match from local for local action "local" match from any for domain <vdomains> action "virtual" match from local mail-from <addresses> for any action "relay" match auth from any mail-from <addresses> for any action "relay" # End of file