Problem on install/configure postfix

[satimis]

Hi folks,


Continued on "The Perfect Setup - Ubuntu Feisty Fawn (Ubuntu 7.04) - Page 5"
http://www.howtoforge.com/perfect_setup_ubuntu704_p5

All went through w/o major problem unitl coming to "telnet localhost 25". I copy/paste the commands on the "Howto" to proceed.


Please help me to clarify following points

1)
On running;

# postconf -e 'smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination'

I replaced "permit_mynetworks" with "permit_eth0". Did I make a mistake here? I have only one NIC on this PC


2)
On running;
# openssl genrsa -des3 -rand /etc/hosts -out smtpd.key 1024

284 semi-random bytes loaded
Generating RSA private key, 1024 bit long modulus
.........++++++
.............++++++
e is 65537 (0x10001)
Enter pass phrase for smtpd.key:1024 [Enter]
Verifying - Enter pass phrase for smtpd.key:1024[Enter]

I use the same smtpd.key number "1024". Can I use different number?



Coming to "telnet localhost 25"

# telnet localhost 25

Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection timed out

The firewall blocks it.
# iptables -F


# cat /etc/rc.local | grep 127.0.0.1

iptables -I OUTPUT 3 -j REJECT -s 127.0.0.1 --reject-with icmp-port-unreachable

# telnet localhost 25

Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 server1.example.com ESMTP Postfix (Ubuntu)
ehlo localhost
(hanging here)

quit 
Connection closed by foreign host.

"server1.example.com" has not been changed to "ubuntu.xyz.com". Where shall I check and how to fix the problem?


TIA


Edit-1 :
====

Hi Falko,

I have finished up to section:-
"18 Synchronize the System Clock"

without problem. Your HOWTO works perfect. Wonderful!!! Thanks.

If NOT installing ISPConfig, do I need proceeding section:-
19 Install Some Perl Modules Needed By SpamAssassin (Comes With ISPConfig)
???


Edit-2 (to fix above problem) :
====

Re-run following steps;

# postconf -e 'myhostname = ubuntu.xyz.com'
no printout

(Remark: Previously I ran;
# postconf -e 'myhostname = server1.example.com' )

# /etc/init.d/postfix restart

 * Stopping Postfix Mail Transport Agent postfix                                               [ OK ] 
 * Starting Postfix Mail Transport Agent postfix                                               [ OK ]

# iptables -F
# telnet localhost 25

Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 ubuntu.xyz.com ESMTP Postfix (Ubuntu)
ehlo localhost
250-ubuntu.xyz.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
quit
221 2.0.0 Bye
Connection closed by foreign host.

Above problem SOLVED


B.R.
satimis