Hallo postfix-users,
Occasionally external systems are tying to send mail with a
faked sender address via my system. So far no harm is done,
ad they have not been able to create a real user name. But
I would like to stop them before they use my mail system,
as soon as they make contact. How can I do this?
Example:
Jul 31 15:31:02 duinheks postfix/smtpd[29511]: NOQUEUE: reject: RCPT from
unknown[218.20.152.23]: 550 5.1.0 <[EMAIL PROTECTED]>: Sender address
rejected:
User unknown in local recipient table; from=<[EMAIL PROTECTED]>
to=<[EMAIL PROTECTED]> proto=ESMTP helo=<chenzao>
Groeten,
Hans.
jdh punt beekhuizen bij duinheks punt nl
Here's my current configurtaion:
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases,
hash:/opt/mailman/data/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
default_transport = smtp
home_mailbox = Mailbox
html_directory = no
local_recipient_maps = $alias_maps unix:passwd.byname
mail_owner = postfix
mailbox_size_limit = 2048000000
mailq_path = /usr/bin/mailq
manpage_directory = /usr/local/man
message_size_limit = 15360000
mydestination = duinheks.nl, $myhostname, localhost.$mydomain
mydomain = duinheks.nl
myhostname = duinheks.nl
mynetworks = 192.168.178.0/24, 127.0.0.0/8
mynetworks_style = host
myorigin = $myhostname
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = no
recipient_delimiter = +
relay_domains = $mydestination, f1018.n280.z2.fidonet.org
relayhost = smtp.xs4all.nl
sample_directory = /etc/postfix
sender_canonical_maps = hash:/etc/postfix/sender_canonical
sendmail_path = /usr/lib/sendmail
setgid_group = postdrop
smtpd_recipient_restrictions = reject_non_fqdn_sender
reject_non_fqdn_recipient reject_unlisted_recipient
reject_unlisted_sender permit_mynetworks reject_unauth_destination
permit
soft_bounce = no
strict_rfc821_envelopes = yes
transport_maps = hash:/etc/postfix/transport
unknown_client_reject_code = 554
unknown_local_recipient_reject_code = 550
--- GoldED+/LNX 1.1.5/080731
* Origin: The Wizard is using MBSE/Linux (2:280/1018)
