Israel Garcia wrote:
This is the postconf -n on my smarthost server.
server:/etc/postfix# postconf -n
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
inet_interfaces = all
mailbox_size_limit = 1024000
mydestination =
myhostname = server.domain
mynetworks = 127.0.0.0/8 xx.xx.xx.xx #<-- my.network.subnet
myorigin = /etc/mailname
readme_directory = no
relayhost =
smtpd_banner = $myhostname ESMTP $mail_name
transport_maps = hash:/etc/postfix/transport
With this conf, only the IPs from mynetworks relay mail throuhg the
smarthost. BUT, I repeat, users can send mail from their servers using
any sender address. How can I block this?
once more: please don't top post.
And yet once more: please post log excerpts showing the misbehaviour (a
"user [...] sending mail from their servers using any server address").
whay you you mean by "any sender address"? An IP address or an email
address?
And your problem is probably that you did not define who is allowed to
use your server as a relay, read
http://www.postfix.org/postconf.5.html#smtpd_client_restrictions
it should be something like:
smtpd_client_restriction =
permit_mynetworks
reject
--
Udo Rader, CTO
http://www.bestsolution.at
http://riaschissl.blogspot.com
