You can do several tests of messages entering the qmail system:

1. SMTP server test: Forge some mail locally via SMTP. Replace ``me''

   with your username and ``domain'' with your host's name.

       % telnet 127.0.0.1 25

       Trying 127.0.0.1...

       Connected to 127.0.0.1.

       Escape character is '^]'.

       220 domain ESMTP

       helo dude

       250 domain

       mail <me@domain>

       250 ok

       rcpt <me@domain>

       250 ok

       data

       354 go ahead

       Subject: testing

       This is a test.

       .

       250 ok 812345679 qp 12345

       quit

       221 domain

       Connection closed by foreign host.

       %

   Look for the message in your mailbox. (Note for programmers: Most

   SMTP servers need more text after MAIL and RCPT. See RFC 821.)

2. Remote-local test: Send yourself some mail from another machine.

   Look for the message in your mailbox.

3. Remote-error test: Send some mail from another machine to

   nonexistent@domain. Look for a bounce message in the remote mailbox.

4. UA test: Try sending mail, first to a local account, then to a

   remote account, with your normal user agent.

5. Remote-postmaster test: Send mail from another machine to

   PoStMaStEr@domain. Look for the message in the alias mailbox,

   normally ~alias/Mailbox.