Postfix
Installing Postfix
Changes for a new install on Debian in /etc/postfix:
touch relay-domains touch virtual touch virtual-domains touch transport touch aliases postmap aliases postmap virtual postmap transport
This goes in some of the files:
/etc/postfix/virtual # In order to translate any mailbox address from one domain to a mapped user on another domain add the following entries: # account1@olddomain.ext account1 # account2@olddomain.ext account2 # newdomain.ext DOMAIN # @newdomain.ext @olddomain.ext # this will ensure that account1@olddomain.ext AND account1@newdomain.ext is delivered to account1 and account2@[newdomain or olddomain].ext goes to account2 # After changing this file run # postmap virtual # Catchalls are set up with # @domain.ext userid /etc/postfix/virtual-domains # This file contains the domains for which postfix will accept email # It's not a hash file, so no need to run postmap on it.
Make sure the following is appended to mynetworks in main.cf
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.0.0/32, 212.61.33.42/32, 31.160.12.64/29, 188.204.140.192/27, 217.81.192.88/32
These are the /etc/postfix/main.cf edits
# Tripany edits
# Prevent backscatter
local_recipient_maps = proxy:unix:passwd.byname $alias_maps
unverified_recipient_reject_code = 550
unverified_sender_reject_code = 550
message_size_limit = 15000000
# Add virtual accounts and all the domains into these two files
virtual_alias_maps = hash:/etc/postfix/virtual
virtual_alias_domains = /etc/postfix/virtual-domains
# To make aliases add them to these files
alias_maps = hash:/etc/postfix/aliases
alias_database = hash:/etc/postfix/aliases
virtual_mailbox_base = /var/spool/mail
# Anti Spam measures
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
reject_unknown_recipient_domain,
reject_unlisted_recipient,
reject_unverified_recipient,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_non_fqdn_hostname,
reject_unknown_sender_domain,
reject_unauth_destination,
reject_unauth_pipelining,
reject_invalid_hostname,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client bl.spamcop.net,
permit
smtpd_client_restrictions = permit_mynetworks,
reject_rbl_client sbl.spamhaus.org,
permit
smtpd_helo_restrictions = permit_mynetworks,
reject_invalid_hostname,
permit
smtpd_sender_restrictions = warn_if_reject,
reject_non_fqdn_sender,
warn_if_reject,
reject_unknown_sender_domain,
warn_if_reject,
reject_unknown_address,
permit
smtpd_data_restrictions = reject_unauth_pipelining,
permit
smtpd_helo_required = yes
disable_vrfy_command = yes
default_process_limit = 100
# This is what postfix will act as an SMTP server for
relay_domains = /etc/postfix/relay-domains
# For delayed delivery using etrn
defer_transports = etrn-only
fast_flush_domains = $relay_domains
smtpd_etrn_restrictions = permit_mynetworks, reject
# This is all added for Mailman
transport_maps = hash:/etc/postfix/transport
mailman_destination_recipient_limit = 1
# This is for maildir delivery
home_mailbox = Maildir/
Some of the documentation on Maildir sets
mailbox_command =
But we're going to configure procmail to deliver to mailbox later, so we keep it as such:
mailbox_command = procmail -a "$EXTENSION"
Check configuration
postconf -n
get rid of the postfix pop daemon
apt-get install dovecot-popa3d (for maildir support)
procmail
Change procmail to maildir delivery. Create /etc/procmailrc
LOGFILE=/var/log/mail/procmail LOGABSTRACT=all VERBOSE=off LOG=$date DEFAULT="$HOME/Maildir/" MAILDIR="$HOME/Maildir/"
rsyslog and logrotation
Edit /etc/logrotate.d/rsyslog to add /var/log/mail/procmail to it
edit the mail lines in /etc/rsyslog.conf to go to /var/log/mail/ and touch /var/log/mail/popa3d.log
add the following to /etc/rsyslogd.conf
!popa3d *.* /var/log/mail/popa3d.log
In /etc/logrotate.d/rsyslog (nb. because we have moved mail logs to /var/log/mail from /var/log)
/var/log/syslog
{
rotate 7
daily
missingok
notifempty
delaycompress
compress
postrotate
invoke-rc.d rsyslog reload > /dev/null
endscript
}
/var/log/daemon.log
/var/log/kern.log
/var/log/auth.log
/var/log/user.log
/var/log/lpr.log
/var/log/cron.log
/var/log/debug
/var/log/messages
/var/log/mail/mail.info /var/log/mail/mail.warn /var/log/mail/mail.err /var/log/mail/mail.log /var/log/mail/popa3d.log /var/log/mail/spamd.log /var/log/mail/procmail
{
sharedscripts
prerotate
/opt/triphost/statisticstripghostmail.sh
endscript
rotate 7
daily
missingok
# notifempty
compress
delaycompress
create 640 root adm
sharedscripts
postrotate
/etc/init.d/rsyslog restart
endscript
}
Mutt
Use Mutt to open a maildir:
mutt -m maildir -f ~/Maildir
Set Mutt to read maildir. Edit /etc/Muttrc
set folder="~/Maildir" set mask="!^\\.[^.]" set mbox="~/Maildir" set record="+.Sent" set postponed="+.Drafts" set spoolfile="~/Maildir"
Useful info
accept for primary MX if it goes down
To accept messages in the mailqueue and defer them untill the primary MX server is up again, add the domain.ext to /etc/postfix/relay-domains and in transport add
domain.ext etrn-only:
The mail will then be delivered when sendmail -q is sent, or when
telnet mailserver 25, helo originating.domain etrn defermaildomain.ext
mails get defered - you can see them in mailq
also in /var/spool/postfix/flush/
postfix reload reloads the config
Squirrelmail and IMAP
for how to set up squirrelmail and cyrus for IMAP with postfix [Webmail_Squirrelmail_for_Debian]
force the queue delivery
postqueue -f
or deliver a specific message by
postsuper -r queue_id
Queue management
See the queue structure
qshape
you can see the active / incoming / deferred / hold queues by doing
qshape deferred
you may have to wait a bit for the output though.
To kill all deferred messages in the queue you can use
postsuper -d ALL deferred
An example from [4]
Example 5-1. Perl script to delete queued messages by email address
#!/usr/bin/perl -w
#
# pfdel - deletes message containing specified address from
# Postfix queue. Matches either sender or recipient address.
#
# Usage: pfdel <email_address>
#
use strict;
# Change these paths if necessary.
my $LISTQ = "/usr/sbin/postqueue -p";
my $POSTSUPER = "/usr/sbin/postsuper";
my $email_addr = "";
my $qid = "";
my $euid = $>;
if ( @ARGV != 1 ) {
die "Usage: pfdel <email_address>\n";
} else {
$email_addr = $ARGV[0];
}
if ( $euid != 0 ) {
die "You must be root to delete queue files.\n";
}
open(QUEUE, "$LISTQ |") ||
die "Can't get pipe to $LISTQ: $!\n";
my $entry = <QUEUE>; # skip single header line
$/ = ""; # Rest of queue entries print on
# multiple lines.
while ( $entry = <QUEUE> ) {
if ( $entry =~ / $email_addr$/m ) {
($qid) = split(/\s+/, $entry, 2);
$qid =~ s/[\*\!]//;
next unless ($qid);
#
# Execute postsuper -d with the queue id.
# postsuper provides feedback when it deletes
# messages. Let its output go through.
#
if ( system($POSTSUPER, "-d", $qid) != 0 ) {
# If postsuper has a problem, bail.
die "Error executing $POSTSUPER: error " .
"code " . ($?/256) . "\n";
}
}
}
close(QUEUE);
if (! $qid ) {
die "No messages with the address <$email_addr> " .
"found in queue.\n";
}
exit 0;
Postgrey is a greylister that rejects email from a server on the first try, using the fact that most spammers do not retry to send their email, whereas almost all normal mail servers do.
Old info
Old pop daemon
apt-get install popa3d
/etc/logrotate.d/postfix:
/var/log/mail/mail.log {
prerotate
/opt/triphost/statisticstripghostmail.sh
endscript
daily
missingok
rotate 7
compress
delaycompress
notifempty
create 640 root adm
}
/var/log/mail/popa3d.log /var/log/mail/mail.err /var/log/mail/mail.info /var/log/mail/mail.warn {
daily
missingok
rotate 7
compress
delaycompress
notifempty
create 640 root adm
}