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Old 22nd August 2012, 02:48
nil ens nil ens is offline
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Default email clients cannot send smtp ispconfig 3

Hello,

I have a new install of ISPConfig3 (my first one) exactly following the tutorial The Perfect Server - Debian Squeeze (Debian 6.0) With BIND & Dovecot [ISPConfig 3]. I'm having problems with remote clients being able to send email via the ISPConfig3 mail server regardless whether they use Thunderbird, Outlook, etc. IMAP and POP3 work fine.

The server is on a virtual machine and NAT'd behind a firewall but all mail ports are open and port forwarded through the firewall. I can successfully send smtp if I connect to the server from a client using the public (inside) IP but cannot if I use the private (internet facing) IP. I know the firewall is not blocking the packets because I debugged and logged smtp packets and the logs show the firewall passing port 25 through to the server.

For example, below is the output from testing using a telnet session. The first test uses the public IP and the second uses the private IP.

Code:
[lself@ex3ws51 ~]$ telnet 192.168.32.101 25
Trying 192.168.32.101...
Connected to 192.168.32.101.
Escape character is '^]'.
220 ex3ksweb01.ex3host.com ESMTP
ehlo mail.ex3.com
250-ex3ksweb01.ex3host.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail from: lself@ex3.com
250 2.1.0 Ok
rcpt to: fidough@ex3test.com
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
test message 20120821_1636
.
250 2.0.0 Ok: queued as 7267F1A4F3
quit
221 2.0.0 Bye
Connection closed by foreign host.

[lself@ex3ws51 ~]$ telnet mail.ex3test.com 25
Trying 69.149.138.211...
telnet: connect to address 69.149.138.211: Connection refused
Here is a tail of my mail.log file:

Code:
Aug 21 19:30:01 ex3ksweb01 dovecot: pop3-login: Disconnected (no auth attempts): rip=127.0.0.1, lip=127.0.0.1, secured
Aug 21 19:30:01 ex3ksweb01 dovecot: imap-login: Disconnected (no auth attempts): rip=127.0.0.1, lip=127.0.0.1, secured
Aug 21 19:30:01 ex3ksweb01 postfix/smtpd[3818]: connect from localhost[127.0.0.1]
Aug 21 19:30:01 ex3ksweb01 postfix/smtpd[3818]: lost connection after CONNECT from localhost[127.0.0.1]
Aug 21 19:30:01 ex3ksweb01 postfix/smtpd[3818]: disconnect from localhost[127.0.0.1]
Aug 21 19:35:01 ex3ksweb01 dovecot: pop3-login: Disconnected (no auth attempts): rip=127.0.0.1, lip=127.0.0.1, secured
Aug 21 19:35:01 ex3ksweb01 dovecot: imap-login: Disconnected (no auth attempts): rip=127.0.0.1, lip=127.0.0.1, secured
Aug 21 19:35:01 ex3ksweb01 postfix/smtpd[3910]: connect from localhost[127.0.0.1]
Aug 21 19:35:01 ex3ksweb01 postfix/smtpd[3910]: lost connection after CONNECT from localhost[127.0.0.1]
Aug 21 19:35:01 ex3ksweb01 postfix/smtpd[3910]: disconnect from localhost[127.0.0.1]
Aug 21 19:40:01 ex3ksweb01 dovecot: pop3-login: Disconnected (no auth attempts): rip=127.0.0.1, lip=127.0.0.1, secured
Aug 21 19:40:01 ex3ksweb01 dovecot: imap-login: Disconnected (no auth attempts): rip=127.0.0.1, lip=127.0.0.1, secured
Aug 21 19:40:01 ex3ksweb01 postfix/smtpd[4001]: connect from localhost[127.0.0.1]
Aug 21 19:40:01 ex3ksweb01 postfix/smtpd[4001]: lost connection after CONNECT from localhost[127.0.0.1]
Aug 21 19:40:01 ex3ksweb01 postfix/smtpd[4001]: disconnect from localhost[127.0.0.1]
I searched for a fix here on the site but no post seemed to fit. I'm not sure if it has to do with SASL or the configuration of amavisd.

Any suggestions?
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