Test Qmail functionalities

We first make a basic check thanks to the script qmr_inst_check

You should have such result :

iReboot your server to be sure all the service are started at boot time

When your server is restarted, we will check if it listen to the right ports

You should have at least the bold ones :

tcp    LISTEN	  0      50             127.0.0.1:3306                  *:*      users:(("mysqld",pid=981,fd=10))
tcp    LISTEN     0      128                    *:783                   *:*      users:(("spamd child",pid=1103,fd=5),("spamd child",pid=1102,fd=5),("/usr/sbin/spamd",pid=802,fd=5))
tcp    LISTEN     0      128                    *:22                    *:*      users:(("sshd",pid=458,fd=3))
tcp    LISTEN     0      20                     *:25                    *:*      users:(("tcpserver",pid=509,fd=3))
tcp    LISTEN     0      128                   :::993                  :::*      users:(("couriertcpd",pid=574,fd=3))
tcp    LISTEN     0      128                   :::995                  :::*      users:(("couriertcpd",pid=547,fd=3))
tcp    LISTEN     0      128                   :::110                  :::*      users:(("couriertcpd",pid=548,fd=3))
tcp    LISTEN     0      128                   :::783                  :::*      users:(("spamd child",pid=1103,fd=6),("spamd child",pid=1102,fd=6),("/usr/sbin/spamd",pid=802,fd=6))
tcp    LISTEN     0      128                   :::143                  :::*      users:(("couriertcpd",pid=569,fd=3))
tcp    LISTEN     0      128                   :::80                   :::*      users:(("apache2",pid=4626,fd=4),("apache2",pid=4625,fd=4),("apache2",pid=4624,fd=4),("apache2",pid=4623,fd=4),("apache2",pid=4621,fd=4),("apache2",pid=4611,fd=4),("apache2",pid=4610,fd=4),("apache2",pid=4609,fd=4),("apache2",pid=4608,fd=4),("apache2",pid=4607,fd=4),("apache2",pid=4603,fd=4))
tcp    LISTEN     0      20                    :::465                  :::*      users:(("sslserver",pid=513,fd=3))
tcp    LISTEN     0      128                   :::22                   :::*      users:(("sshd",pid=458,fd=4))

In this case, Qmail should now be able to send and receives e-mails.

Among couriertcpd/tcpserver/sslserver, the ports

• 25 is for SMTP
• 110 is for POP3
• 143 is for IMAP
• 465 is for SMTP-SSL
• 993 is for POP3S (POP3-SSL)
• 995 is for IMAPS (IMAP-SSL)

Receiving e-mails

You should have an answer like this :

This demonstrate a successful SMTP connection !

For our tests, we need to create a dummy account

We also can create a real account

You can of course do the same thing via vqadmin and qmailadmin web interfaces

"brol" is a belgian idiom that means "something useless"

You can send a test mail to an_account@your_real_domain.tld from you regular mail client. We 'll retrieve it in the next step but if you don't receive a NDR, it's probably already OK

Sending e-mail through an authentificate connection : Testing TLS

You should have an answer like this:

In the above SMTP session, I have higlighted the important aspects in DARK RED. After you give the server the initial "ehlo localhost" command, you should get a response back that lists "250-STARTTLS", signaling that the server is in fact equipped for TLS functionality. Then, after you issue the "starttls" command, you should get the :"220 ready for tls" response if the server is able to successfully start the TLS session.

Now we have verified that the server supports the STARTTLS command, we can use openssl s_client to connect.

This command is equivalent to the previous sequence until the "220 ready for tls" message

As you've probably noticed, the login and password are encoded ( "dGVzdEB0ZXN0LmNvbQ==" stands for "[email protected]" and "YnJvbDI=" stands for "brol2")! You can encode yourself with the script base64

Test SMTP-SSL

It's nearly the same test. In this case, we use an SSL server where we connect to a different port number. We have to establish an SSL connection before the SMTP conversation even starts :

Test authentification