Setting up Mail Server on centOS, hehe

WoAnerges · 04-26-2012, 11:07 AM

Hey guys!

I decided to setup a server on centOS and I'm following this guide, but I am stuck on this step, where they say, it is required to install postfix and system-switch-mail-gnome packages, but when I type

Code:

$ yum install system-switch-mail-gnome
Loaded plugins: fastestmirror, presto, priorities
Loading mirror speeds from cached hostfile
 * base: mirror.nexcess.net
 * centosplus: mirror.trouble-free.net
 * extras: mirror.net.cen.ct.gov
 * updates: centos.mirror.choopa.net
Setting up Install Process
No package system-switch-mail-gnome available.
Error: Nothing to do

, I am getting an error. Looks like, there is no such package and I don't know, what shall I do.

Code:

$ cat /etc/*-release
CentOS release 6.2 (Final)
CentOS release 6.2 (Final)
CentOS release 6.2 (Final)

Code:

$ uname -mrs
Linux 2.6.32-220.13.1.el6.centos.plus.x86_64 x86_64

I heard, that there is no such package since centOS6, but what shall I do then?

Thank you!

Kustom42 · 04-26-2012, 11:21 AM

That package is for Gnome(A GUI for red hat systems) to be able to help you manage your mail server. There is not a need for that package to be installed to setup postfix.

Check out http://wiki.centos.org/HowTos/postfi...=%28postfix%29

It talks about those packages and how they are optional and will walk you through the install. Best of luck.

Kustom42 · 04-26-2012, 11:23 AM

This is also a good url to bookmark for help configuring postfix: http://www.postfix.org/documentation.html

WoAnerges · 04-26-2012, 11:50 AM

Hey,

so, it wants me to create some real user accounts, in order, for them, to be able to receive mails.
It wants me to check mails in /home/<username/Maildir/new/, so if I want a support@domain.com email, then I have to create such username?

Thanks!

Kustom42 · 04-26-2012, 12:20 PM

Thats correct. The user must be setup on the system.

WoAnerges · 04-26-2012, 12:28 PM

Kusom42,
could you help me to configure this fake user, to achieve a best security?

Code:

$ useradd support

What would you do next?

Kustom42 · 04-26-2012, 12:37 PM

For security you should set the default shell to be /sbin/nologin for the users if they are only going to be receiving mail.

Code:

useradd -s/sbin/nologin username

You can change the one that already has been added by switching to the user and using the 'chsh' command or editing your /etc/passwd file and changing it from /bin/bash to /sbin/nologin. After you have your user's set up you will want to look at configuring dovecot to allow pop3 connections for email retrieval. One gotcha with dovecot is that you will need to set it to run on boot with chkconfig as it will not by default after installation.

Code:

/sbin/chkconfig --levels 2345 dovecot on

WoAnerges · 04-26-2012, 03:35 PM

Code:

# /sbin/chkconfig --levels 2345 dovecot on
error reading information on service dovecot: No such file or directory

I will allow pop3 connections by entering this command?
Or I should do

Code:

iptables -A INPUT -p tcp --dport 110 -j ACCEPT

?

I've run the command "/sbin/chkconfig --levels 2345 dovecot on" and it went without any errors.
I've installed dovecot. Should I add port 110 with iptables or in some other way?

I'm at this stage
and I am getting these errors:

Code:

Stopping Dovecot Imap:                                     [FAILED]
Starting Dovecot Imap: doveconf: Warning: NOTE: You can get a new clean config file with: doveconf -n > dovecot-new.conf
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf: service(pop3-login): vsz_limit is too low

I tried to find, where to change vsz_limit, but failed. Can you help me to find, where is it?

I've added these lines into dovecot.conf:

Code:

auth default {	
  socket listen {
    client {
	  path = /var/spool/postfix/private/auth
	  mode = 0660
	  user = postfix
	  group = postfix
    }
  }	
  mechanisms = plain login
}

and received this message:

Code:

# service dovecot restart
Stopping Dovecot Imap:                                     [FAILED]
Starting Dovecot Imap: doveconf: Warning: NOTE: You can get a new clean config file with: doveconf -n > dovecot-new.conf
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:86: add auth_ prefix to all settings inside auth {} and remove the auth {} section completely

So, I did, like they said:

Code:

auth_path = /var/spool/postfix/private/auth
auth_mode = 0660
auth_user = postfix
auth_group = postfix
auth_mechanisms = plain login

and this is, what I get:

Code:

# service dovecot restart
Stopping Dovecot Imap:                                     [FAILED]
Starting Dovecot Imap: doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf line 86: Unknown setting: auth_path
                                                           [FAILED]

Wrong email server setup guide? Maybe someone has a better guide?

WoAnerges · 04-28-2012, 04:46 AM

Up, please, guys.

mail2ganesh.cse · 04-29-2012, 10:36 AM

[root@mail ~]#
vi /etc/postfix/main.cf
# line 75: uncomment and specify hostname

myhostname =
mail.server.world
# line 83: uncomment and specify domain name

mydomain =
server.world
# line 99: uncomment

myorigin = $mydomain
# line 116: change

inet_interfaces =
all
# line 119: change if you use only IPv4

inet_protocols =
ipv4
# line 164: add

mydestination = $myhostname, localhost.$mydomain, localhost
, $mydomain
# line 264: uncomment and specify your LAN

mynetworks = 127.0.0.0/8,
10.0.0.0/24
# line 419: uncomment (use Maildir)

home_mailbox = Maildir/
# line 545: uncomment, line 546: add

header_checks = regexp:/etc/postfix/header_checks
body_checks = regexp:/etc/postfix/body_checks
# line 571: add

smtpd_banner = $myhostname ESMTP
# add at the last line

# limit an email size 10M

message_size_limit = 10485760

# limit mailbox 1G

mailbox_size_limit = 1073741824
# for SMTP-Auth settings

smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
smtpd_client_restrictions = permit_mynetworks,reject_unknown_client,permit
smtpd_recipient_restrictions = permit_mynetworks,permit_auth_destination,permit_sasl_authenticated,reject
[root@mail ~]#
vi /etc/postfix/header_checks
# add at the head

# reject if email address is empty

/^From:.*<#.*@.*>/ REJECT
/^Return-Path:.*<#.*@.*>/ REJECT
[root@mail ~]#
vi /etc/postfix/body_checks
# reject if includes 'example.com' in mail body

/^(|[^>].*)example.com/ REJECT
[root@mail ~]#
/etc/rc.d/init.d/postfix start

Starting postfix:
[ OK ]

[root@mail ~]#
chkconfig postfix on

mail2ganesh.cse · 04-29-2012, 10:38 AM

[root@mail ~]#
yum -y install dovecot
[root@mail ~]#
vi /etc/dovecot/dovecot.conf
# line 31: change ( if not use IPv6 )

listen =
*
[root@mail ~]#
vi /etc/dovecot/conf.d/10-auth.conf
# line 9: uncomment and change ( allow plain text auth )

disable_plaintext_auth =
no
# line 97: add

auth_mechanisms = plain
login
[root@mail ~]#
vi /etc/dovecot/conf.d/10-mail.conf
# line 30: uncomment and add

mail_location =
maildir:~/Maildir
[root@mail ~]#
vi /etc/dovecot/conf.d/10-master.conf
# line 84-86: uncomment and add

# Postfix smtp-auth
unix_listener /var/spool/postfix/private/auth {
mode = 0666

user = postfix
# add

group = postfix
# add

}
[root@mail ~]#
/etc/rc.d/init.d/dovecot start

Starting Dovecot Imap:
[ OK ]

[root@mail ~]#
chkconfig dovecot on

mail2ganesh.cse · 04-29-2012, 10:39 AM

root@mail ~]#
yum --enablerepo=epel -y install mailgraph

# install from EPEL
[root@mail ~]#
vi /etc/httpd/conf.d/mailgraph.conf
Alias /mailgraph /usr/share/mailgraph
AddHandler cgi-script .cgi
<Directory /usr/share/mailgraph/>
AllowOverride None
Options +ExecCGI
DirectoryIndex mailgraph.cgi
Order Deny,Allow
Deny from all
Allow from 127.0.0.1
10.0.0.0/24
# IP address you allow

</Directory>
[root@mail ~]#
/etc/rc.d/init.d/mailgraph start

Starting mailgraph:
[ OK ]

[root@mail ~]#
/etc/rc.d/init.d/httpd restart

Stopping httpd:
[ OK ]

Starting httpd:
[ OK ]

[root@mail ~]#
chkconfig mailgraph on

WoAnerges · 04-29-2012, 04:09 PM

Dear mail2ganesh.cse,

thank you so much for sparing such a huge amount of your time, to create a guide! I am sure, it will help a lot of people in the future.

I did everything and everything started normally, except the last one:

Quote:

# yum --enablerepo=epel -y install mailgraph
Loaded plugins: fastestmirror, presto, priorities

Error getting repository data for epel, repository not found
# yum install mailgraph
Loaded plugins: fastestmirror, presto, priorities
Loading mirror speeds from cached hostfile
* base: mirror.cogentco.com
* centosplus: mirror.symnds.com
* extras: mirror.trouble-free.net
* updates: mirror.trouble-free.net
base | 3.7 kB 00:00
c5-testing | 3.0 kB 00:00
centosplus | 3.5 kB 00:00
contrib | 951 B 00:00
extras | 3.5 kB 00:00
updates | 3.5 kB 00:00
Setting up Install Process
No package mailgraph available.
Error: Nothing to do

Is there another way to get a mailgraph?

Thank you.

Also, this thing:

Quote:

# /etc/rc.d/init.d/httpd restart
Stopping httpd: [ OK ]
Starting httpd: httpd: apr_sockaddr_info_get() failed for mycomputer
httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
[ OK ]

mail2ganesh.cse · 04-30-2012, 09:26 AM

Quote:
# /etc/rc.d/init.d/httpd restart
Stopping httpd: [ OK ]
Starting httpd: httpd: apr_sockaddr_info_get() failed for mycomputer
httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
[ OK ]

Kindly,

check the conf file of resolv.conf, nd hosts in /etc/.... the DNS in not fulled qulified...

&

for mail graph
apt-get install rrdtool mailgraph
dpkg-reconfigure mailgraph
Logfile used by mailgraph: <-- /var/log/mail.log

cp -p /usr/lib/cgi-bin/mailgraph.cgi /var/www/www.example.com/cgi-bin

WoAnerges · 04-30-2012, 09:44 AM

should I literally use "mail.server.world", or should I change it to my domain name?
apt-get isn't working. Should I use yum install instead?

!mailgraph installation package cannot be found.

resolv.conf content (is it fine?):
nameserver 8.8.8.8
nameserver 8.8.4.4

Here, is what centOS6 prints:
(should I install all these additional packages?)

Quote:

# apt-get
-bash: apt-get: command not found

# yum install rrdtool mailgraph
Loaded plugins: fastestmirror, presto, priorities
Loading mirror speeds from cached hostfile
* base: mirror.cogentco.com
* centosplus: mirror.symnds.com
* extras: mirror.trouble-free.net
* updates: mirror.trouble-free.net
base | 3.7 kB 00:00
c5-testing | 3.0 kB 00:00
centosplus | 3.5 kB 00:00
contrib | 951 B 00:00
extras | 3.5 kB 00:00
updates | 3.5 kB 00:00
Setting up Install Process
No package mailgraph available.
Resolving Dependencies
--> Running transaction check
---> Package rrdtool.x86_64 0:1.3.8-6.el6 will be installed
--> Processing Dependency: dejavu-sans-mono-fonts for package: rrdtool-1.3.8-6.el6.x86_64
--> Processing Dependency: dejavu-lgc-sans-mono-fonts for package: rrdtool-1.3.8-6.el6.x86_64
--> Processing Dependency: libpangocairo-1.0.so.0()(64bit) for package: rrdtool-1.3.8-6.el6.x86_64
--> Processing Dependency: libcairo.so.2()(64bit) for package: rrdtool-1.3.8-6.el6.x86_64
--> Processing Dependency: libpango-1.0.so.0()(64bit) for package: rrdtool-1.3.8-6.el6.x86_64
--> Running transaction check
---> Package cairo.x86_64 0:1.8.8-3.1.el6 will be installed
--> Processing Dependency: libpixman-1.so.0()(64bit) for package: cairo-1.8.8-3.1.el6.x86_64
---> Package dejavu-lgc-sans-mono-fonts.noarch 0:2.30-2.el6 will be installed
--> Processing Dependency: dejavu-fonts-common = 2.30-2.el6 for package: dejavu-lgc-sans-mono-fonts-2.30-2.el6.noarch
---> Package dejavu-sans-mono-fonts.noarch 0:2.30-2.el6 will be installed
---> Package pango.x86_64 0:1.28.1-3.el6_0.5.1.centos will be installed
--> Processing Dependency: libthai >= 0.1.9 for package: pango-1.28.1-3.el6_0.5.1.centos.x86_64
--> Processing Dependency: libthai.so.0(LIBTHAI_0.1)(64bit) for package: pango-1.28.1-3.el6_0.5.1.centos.x86_64
--> Processing Dependency: libthai.so.0()(64bit) for package: pango-1.28.1-3.el6_0.5.1.centos.x86_64
--> Processing Dependency: libXft.so.2()(64bit) for package: pango-1.28.1-3.el6_0.5.1.centos.x86_64
--> Running transaction check
---> Package dejavu-fonts-common.noarch 0:2.30-2.el6 will be installed
--> Processing Dependency: fontpackages-filesystem for package: dejavu-fonts-common-2.30-2.el6.noarch
---> Package libXft.x86_64 0:2.1.13-4.1.el6 will be installed
---> Package libthai.x86_64 0:0.1.12-3.el6 will be installed
---> Package pixman.x86_64 0:0.18.4-1.el6_0.1 will be installed
--> Running transaction check
---> Package fontpackages-filesystem.noarch 0:1.41-1.1.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

==================================================================================================== ====
Package Arch Version Repository Size
==================================================================================================== ====
Installing:
rrdtool x86_64 1.3.8-6.el6 base 293 k
Installing for dependencies:
cairo x86_64 1.8.8-3.1.el6 base 309 k
dejavu-fonts-common noarch 2.30-2.el6 base 59 k
dejavu-lgc-sans-mono-fonts noarch 2.30-2.el6 base 393 k
dejavu-sans-mono-fonts noarch 2.30-2.el6 base 450 k
fontpackages-filesystem noarch 1.41-1.1.el6 base 8.8 k
libXft x86_64 2.1.13-4.1.el6 base 49 k
libthai x86_64 0.1.12-3.el6 base 183 k
pango x86_64 1.28.1-3.el6_0.5.1.centos updates 350 k
pixman x86_64 0.18.4-1.el6_0.1 base 146 k

Transaction Summary
==================================================================================================== ====
Install 10 Package(s)

Total download size: 2.2 M
Installed size: 5.6 M
Is this ok [y/N]: