Configure DNS with domain name “abc.com” on the server.

#  yum  install  sendmail*
#  yum  install  dovecot*
#  yum  install  httpd*
#  yum  install  squirrelmail*

Sendmail configuration :

Edit in sendmail.mc :

#  vi  /etc/mail/sendmail.mc

Look for these lines :

DAEMON_OPTIONS(‘Port=smtp, Addr=127.0.0.1, Name=MTA’)dnl
FEATURE (‘accept_unresolvable_domains’)dnl

Comment them by adding “dnl #” in the beginning (without quotes).
Save and quit.

Generate sendmail.cf from sendmail.mc :

#   m4  /etc/mail/sendmail.mc  >  /etc/mail/sendmail.cf
#  service  sendmail  restart

Dovecot configuration :

#  vi  /etc/dovecot.conf

Look for the line :

# protocols = imap imaps pop3 pop3s

Uncomment by removing “#”.
Save and quit.

#  service  dovecot  restart.

Webserver configuration :

#  vi  /etc/httpd/conf/httpd.conf

Move at the end and set the server name :

ServerName http://www.abc.com
Save and quit.

#  Service  httpd  restart.

Squirrelmail configuration :

Move to :

#   cd  /usr/share/squirrelmail/config
#   ./conf.pl

Now select option 1 (Organization Preferences).

Organization Name : YOUR_ORG_NAME
Organization Title : YOUR_ORG_NAME Webmail
Provider link : http://YOUR_ORG_SITE_ADDRESS
Provider name : YOUR_ORG_NAME

Now select option 2 (Server Settings).

Domain : abc.com
Sendmail or SMTP : Sendmail
IMAP Server : localhost
IMAP Port : 143
Server software : uw
Delimiter : /

Now select option 3 (Folder Settings).

Default Folder Prefix : mail/
Show Folder Prefix Option : true

Trash Folder : Trash
Sent Folder : Sent
Drafts Folder : Drafts
By default, move to trash : true
By default, move to sent : true
By default, save as draft : true
List Special Folders First : true
Show Special Folders Color : true
Auto Expunge : true
Default Sub. of INBOX : false
Show ‘Contain Sub.’ Option : true
Default Unseen Notify : 2
Default Unseen Type : 1
Auto Create Special Folders : true
Folder Delete Bypasses Trash : false
Enable /NoSelect folder fix : false

Now select option 4 (General Settings).

Data Directory : /var/lib/squirrelmail/prefs/
Attachment Directory : /var/spool/squirrelmail/attach/
Directory Hash Level : 0
Default Left Size : 150
Usernames in Lowercase : false
Allow use of priority : true
Hide SM attributions : false
Allow use of receipts : true
Allow editing of identity : true
Allow editing of name : true
Remove username from header : false
Allow server thread sort : true
Allow server-side sorting : true
Allow server charset search : true
Enable UID support : true
PHP session name : SQMSESSID
Location base :

Now choose option 8 (Plugins) and select the plugins that you wish to provide to your webmail users.

Save and quit.

Now, open your web browser and type :

http://%5Bserver-ip%5D/webmail
OR
http://www.abc.com/webmail

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