I noticed a number of people have questions regarding these setups, I'm no expert on email systems or the programs described here, but I do have an email server running on Fedora Core 2 that serves about 30 users and its working quite well so here's what I have learnt in setting up and maintaining that server.
This howto will explain how to go about setting up an email server on Fedora Core 3 using Postfix, Dovecot, Squirrelmail, Spamassassin, ClamAV and Amavisd. I have also done a similar setup on Fedora Core 2. My best advice is to set this up first on a workstation and test it thoroughly before setting up on a server and going live with it!
This howto does not go into much detail, if you are looking for a full explanation of what is going on then read the documentation for each progarm. This is merely a step by step guide to get you up and running. You may use apt / yum to install software. I do not use these programs so these instructions do not include the use of them, feel free to adjust these
instructions as you see fit.
STEPS
* Assume a clean install of fedora core 3.
* Commands run as root.
1. Run System Settings > Add/Remove Applications
Under the Email Server sections select Spamassassin,
Postfix, Squirrelmail and Dovecot then click ok and update the system.
2. Run the command:
and choose postfix as the default MTA.
3. Configure postfix by changing the following in /etc/postfix/main.cf
Code:
myhostname = ~YOUR IP ADDRESS OR DOMAIN NAME~
myorigin = $mydomain
inet_interfaces = $myhostname, localhost
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
home_mailbox = Maildir/
4. Start Postfix and Test
Run
Code:
/etc/rc.d/init.d/postfix start
If it doesn't start check /var/log/maillog for specific errors
Run:
Code:
echo "hello" | mail root
Check /root/Maildir/new for a message. You can read the message
with the less command or any text editor you prefer.
5. Configure Dovecot by changing the following in /etc/dovecot.conf
Code:
protocols = imap pop3
6. Start Dovecot and Test
Run
Code:
echo "hello" | mail ~NON ROOT USER~
Run
Code:
/etc/rc.d/init.d/httpd restart
Run
Code:
/etc/rc.d/init.d/dovecot start
Browse
http://localhost/webmail
Login with the non root user's username and password
You should have an email with the message "hello"
7. Setup Thunderbird mail to use pop3 and check for email.
Use your IP address as the server and log in using the same
non root user. You should get the same email with the message
"hello".
You now have a usable email system running but you should set up postfix so
that it isn't an open relay by making it require authentication on SMTP
transactions. you also want to setup virus scanners and spam filters, so lets
get to it...
8. Enable SMTP Authentication
8.1 Check that Cyrus SASL is installed
Run as root:
Code:
rpm -qa | grep sasl
You should get:
Code:
cyrus-sasl-2.1.19-3
cyrus-sasl-devel-2.1.19-3
cyrus-sasl-plain-2.1.19-3
cyrus-sasl-md5-2.1.19-3
there may be a few others, that's ok.
If these are not installed, find the rpms on your distro cdroms and
install them.
8.2 Edit /etc/postfix/main.cf and add the following to the bottom of the file:
Code:
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions =
permit_sasl_authenticated,
check_relay_domains
8.3 Start the saslauthd by running
Code:
/etc/rc.d/init.d/saslauthd start
8.4 Reload postfix by running
Code:
/etc/rc.d/init.d/postfix restart
8.5 Try sending mail to yourself using a pop3 client. You must have
the right settings in your mail client, be sure to use SMTP auth!
Check
http://postfix.state-of-mind.de/patr...etter/smtpauth
for more information on this.
9. Install ClamAv from RPM
Run:
Code:
rpm -Uvh clamav-0.83-1.i386.rpm
Finally we install amavisd-new and configure it appropriately.
10. Install Required Programs and Packages
Get the following rpms from
http://dag.wieers.com/packages/
http://dries.studentenweb.org/apt/
http://freshrpms.net/packages/
http://rpmfind.net/linux/RPM/fedora/...4-40.i386.html
arc
cabextract
freeze
lzo
lzop
ncompress
nomarch
unarj
unrar
zoo
perl-Archive-Zip-1.09-0.1.fc3.rf.noarch.rpm
perl-BerkeleyDB-0.26-1.1.fc3.rf.i386.rpm
perl-Convert-BinHex-1.119-1.1.fc3.rf.noarch.rpm
perl-Convert-TNEF-0.17-2.1.fc3.rf.noarch.rpm
perl-Convert-UUlib-1.03-1.1.fc3.rf.i386.rpm
perl-IO-stringy-2.109-1.1.fc3.rf.noarch.rpm
perl-MailTools-1.66-1.1.fc3.rf.noarch.rpm
perl-MIME-tools-5.415-1.1.fc3.test.noarch.rpm
perl-Net-Server-0.86-0.1.fc3.rf.noarch.rpm
perl-TimeDate-1.16-1.1.fc3.rf.noarch.rpm
perl-Unix-Syslog-0.100-0.1.fc3.rf.i386.rpm
Install the Following from the CDROM distros
perl-Archive-Tar-1.08-3.noarch.rpm
perl-Compress-Zlib-1.33-6.i386.rpm
These are all required by amavisd-new
11. Install the amavisd-new rpm
Run:
Code:
rpm -Uvh amavisd-new-2.2.0-3.1.fc3.rf.i386.rpm
12. Test amavisd-new
Run:
Code:
/etc/rc.d/init.d/amavisd start
Run:
Code:
telnet localhost 10024
you should be greeted by amavisd-new.
13. Configure postfix
add the following to /etc/postfix/master.cf at the bottom
Code:
smtp-amavis unix - - y/n - 2 smtp
-o smtp_data_done_timeout=1200
-o smtp_send_xforward_command=yes
-o disable_dns_lookups=yes
127.0.0.1:10025 inet n - y/n - - smtpd
-o content_filter=
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o mynetworks=127.0.0.0/8
-o strict_rfc821_envelopes=yes
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
-o smtpd_client_connection_count_limit=0
-o smtpd_client_connection_rate_limit=0
-o receive_override_options=no_header_body_checks,no_unknown_recipient_checks
test it by doing the following:
Run:
Code:
telnet localhost 10025
you should be greeted by postfix
Run:
Code:
postconf -e 'content_filter=smtp-amavis:[127.0.0.1]:10024'
14. Test
Run:
Code:
echo "hello" | mail ~NON ROOT USER~
check mail for the non root user, you should have recieved mail.
15. Configure ClamAV
Run:
Code:
mkdir /var/run/amavis
chown amavis /var/run/amavis
chown amavis /var/run/clamav
Edit /etc/clamd.conf making the following changes:
Code:
LocalSocket /var/run/amavis/clamd.ctl
#TCPSocket 3310 -- comment this out!!
User amavis
Run:
Code:
/etc/rc.d/init.d/clamd restart
Check /var/log/maillog and make sure that clamd has no errors
16. Configure Amavisd
Edit /etc/amavisd.conf making the following changes
Code:
$sa_tag_level_deflt = 0.0;
...
['ClamAV-clamd',
\&ask_daemon, ["CONTSCAN {}\n", "/var/run/amavis/clamd.ctl"],
qr/\bOK$/, qr/\bFOUND$/,
qr/^.*?: (?!Infected Archive)(.*) FOUND$/ ],
restart amavisd:
Code:
/etc/rc.d/init.d/amavisd restart
17. Test again
Run:
Code:
echo "this is a test" | mail ~NON ROOT USER~
log in as the non root user, read the email and view the full
headers, you should see that the message passes through amavisd.
That's all folks! Play around with the configuration settings and tweak it to your tatse!
If I screwed up something somewhere please let me know. Also if you find this helpful let me know too.
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