sendmail postfix dovecot iptables and mutt

# sendmail config

1. /etc/mail/access

2. /etc/mail/local-host-name

3. /etc/mail/sendmail.mc    # comment out 127.0.0.1 line

4. chkconfig sendmail on

 

# postfix  config

1. /etc/postfix/main.cf   #comment out inet=all interface

                                         #mydomain = example.com

                                         #myhostname = inst.example.com

                                         #mynetwork = 192.168.1.0/24,127.0.0.0/8

2. alternatives --config mta

3. service sendmail stop

4. servcie postfix start

5. chkconfig postfix on

 

# dovecot config

1. /etc/dovecot.conf   # comment out ssl line

                                     # comment out protocol line ,leave request pops or imaps

2. cd /etc/pki/tls/certs

3. make dovecot.pem

4. cp dovecot.pem /etc/pki/dovecot/certs

5. cp dovecot.pem /etc/pki/dovecot/privates

6. service dovecot restart

7. chkconfig dovecot on

 

#use iptables to limit 192.168.1.0/24##

iptables -I INPUT -s 192.168.1.0/24 -p tcp --dport 25 -j DROP

( restrict from smtp sendmail and postfix)

 

iptables -A INPUT -s 192.168.1.0/24 -p tcp --dport 993 995 -j DROP (restrict from dovecot imaps and pops)

 

service iptables save    # this command will keep the config over

reboot

 

#test sendmail and postfix via tealnet 25

telnet 192.168.1.10 25

helo  cache

mail from:[email protected]

rcpt to:[email protected]

data

uuuuuuuu

.

quit

 

#test access dovecot from remote machine#

mutt -f pops: //[email protected]

mutt -f imaps: //[email protected]

 

 

 

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