Hi,
I have a local mail server installed inside the LAN. From the Firewall all port
25 traffic is being delivered to this mail server. I am trying to add
disclaimer on the local mail server for the outgoing emails. There is only one
interface for outgoing and incoming mail on to mail server. I followed the
guides available on the internet but not able to do so. Please help me. My
configurations are as below
OS: Gentoo
postconf -n
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
debug_peer_level = 2
home_mailbox = .maildir/
html_directory = /usr/share/doc/postfix-2.2.10/html
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
message_size_limit = 20480000
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain,
mail.$mydomain, www.$mydomain, ftp.$mydomain
mynetworks = 192.168.22.0/24, 192.168.7.0/24, 127.0.0.0/8, 192.168.90.0/24
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases
readme_directory = /usr/share/doc/postfix-2.2.10/readme
relayhost = mail.corpshield.com:8025
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated,
reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
unknown_local_recipient_reject_code = 550
The relevent part of master.cf
smtp inet n - n - - smtpd
8025 inet n - n - - smtpd
The above two lines are the default means they are here before the changes. I
am adding below two lines
8125 inet n - y - - smtpd
-o content_filter=dfilt:
8125 inet n - y - - smtpd
-o content_filter=dfilt:
dfilt unix - n n - - pipe
flags=Rq user=filter argv=/etc/postfix/disclaimer -f ${sender} --
${recipient}
I have altermime package is installed. With the help of IPtables I am sending
all port 25 packets coming from LAN to go to 8125 port as
iptables -t nat -A PREROUTING -p tcp -s $LAN --dport 25 -j REDIRECT --to-port
8125
But when I am sending mails it is not adding any disclaimer and in the logs
also I am not seeing any line such as relay=dfilt.
One more weired behavior I am facing is that when I am apply the above settings
User's are not able to authenticate with the mail server. I do not know where I
am missing. Please help me.
Bijayant Kumar
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