[Dovecot] Dovecot LDA and "undeliverable" emails

[Kat Wisnosky]

I googled around looking for this, apparantly my google-fu is failing this
morning.  I just switched over to using a Postfix/Dovecot virtual set-up
with Dovecot as the delivery agent.  One of my users mistyped his email
address when he paid for something through Paypal and the reciept got
forwarded to everyone.  It didn't bounce or just go to Postmaster, it was
delivered to every valid user on the system.

Below is my conf comments stripped:

base_dir= /var/run/dovecot/
login_process_per_connection = no
max_mail_processes = 2048
mail_process_size = 1024
protocols = imap imaps pop3 pop3s
shutdown_clients = yes
log_path = /var/log/dovecot
info_log_path = /var/log.dovecot.info
log_timestamp = "%b %d %H:%M:%S "
ssl_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
ssl_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
ssl_disable = no
disable_plaintext_auth = no
login_dir = /var/run/dovecot/login
login_chroot = yes
login_user = dovecot
login_greeting = Dovecot ready
mail_location = maildir:/home/vmail/%d/%n
mmap_disable = no
valid_chroot_dirs = /var/spool/mail

protocol lda {
  postmaster_address = kat at amtpolitics.com
  log_path = /home/vmail/dovecot-deliver.log

  # UNIX socket path to master auth server to find users:
  auth_socket_path = /var/run/dovecot/auth-master

  # Enabling Sieve plugin for server-side mail filtering
  # Will be handy for Spam - will be implemented later.
  #mail_plugins = cmusieve
  #global_script_path = /home/vmail/globalsieverc
}

protocol imap {
  login_executable = /usr/lib/dovecot/imap-login
  mail_executable = /usr/lib/dovecot/imap
}
protocol pop3 {
  login_executable = /usr/lib/dovecot/pop3-login
  mail_executable = /usr/lib/dovecot/pop3
  pop3_uidl_format = %08Xu%08Xv
}
auth_executable = /usr/lib/dovecot/dovecot-auth
auth_verbose = yes
auth_debug = yes
auth default_with_listener {
  socket listen {
     master {
       path = /var/run/dovecot/auth-master
       mode = 0600
       user = vmail
   }
     client {
       path = /var/spool/postfix/private/auth
       mode = 0660
       user = postfix
       group = postfix
   }
  }
  mechanisms = plain login
  passdb sql {
    # Path for SQL configuration file, see /etc/dovecot/dovecot-sql.conf for
example
    args = /etc/dovecot/dovecot-sql.conf
  }
   userdb static {
    args = uid=5000 gid=5000 home=/home/vmail/%d/%n allow_all_users=yes
  }

 }

imap_client_workarounds = delay-newmail outlook-idle netscape-eoh
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
login_process_size = 64

namespace private {
  separator = .
  prefix = INBOX.
  inbox = yes
}

And here's the mail.log from a test message that I sent out:
Mar 16 09:52:46 byron postfix/smtpd[24082]: C75E84F006D:
client=unknown[xxx.xx.xxx.xx], sasl_method=LOGIN,
sasl_username=kat at amtpolitics.com
Mar 16 09:52:46 byron postfix/cleanup[24085]: C75E84F006D:
message-id=<46497375E9264D2BA3BFB31BE37918BC at Kat>
Mar 16 09:52:46 byron postfix/qmgr[19409]: C75E84F006D:
from=<kat at amtpolitics.com>, size=887, nrcpt=10 (queue active)
Mar 16 09:52:47 byron postfix/smtpd[24082]: disconnect from
unknown[216.70.186.80]
Mar 16 09:52:47 byron postfix/pipe[24096]: C75E84F006D:
to=<xxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.27, delays=0.2/0.01/0/0.06, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24092]: C75E84F006D:
to=<xxxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.27, delays=0.2/0.01/0/0.07, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24107]: C75E84F006D:
to=<xxxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.3, delays=0.2/0.04/0/0.06, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24098]: C75E84F006D:
to=<xxxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.3, delays=0.2/0.02/0/0.08, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24102]: C75E84F006D:
to=<kat at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.3, delays=0.2/0.03/0/0.08, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24086]: C75E84F006D:
to=<xxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.31, delays=0.2/0/0/0.1, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24094]: C75E84F006D:
to=<xxxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.31, delays=0.2/0.01/0/0.09, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24105]: C75E84F006D:
to=<xxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.31, delays=0.2/0.03/0/0.07, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24109]: C75E84F006D:
to=<xxxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.31, delays=0.2/0.04/0/0.06, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/pipe[24101]: C75E84F006D:
to=<xxxxx at amtpolitics.com>, orig_to=<nonexistantemail at amtpolitics.com>,
relay=dovecot, delay=0.33, delays=0.2/0.02/0/0.1, dsn=2.0.0, status=sent
(delivered via dovecot service)
Mar 16 09:52:47 byron postfix/qmgr[19409]: C75E84F006D: removed

Thanks for any help,
 Kat