[Dovecot] Dovecot LDA and "undeliverable" emails

[Kat Wisnosky]

Timo wrote:

> So Postfix delivers bounces to everyone by calling Dovecot LDA
> separately for each bounce? Looks like a Postfix configuration problem
> to me.

I should have been more specific... because we'd also changed domain names 
at the time we moved over to using Dovecot as the LDA, I temporarily 
disabled automatically bouncing mail addressed to invalid users because I 
figured that we'd have at least one who decided that they didn't want the 
standard formation of email addresses...  What I'd wanted to happen was for 
Postfix to accept the message(s) and then for them to be delivered to the 
postmaster address so that I could address the issue.

I'm still unsure as to why, when Dovecot couldn't find the user in the 
tables, it copied the message to every user of the system - that seems like 
odd behavior, which indicates that even though the system is "working", I 
need to fine-tune something.

And at Charles request, here's the output of dovecot -n:

# 1.0.10: /etc/dovecot/dovecot.conf
base_dir: /var/run/dovecot/
log_path: /var/log/dovecot
info_log_path: /var/log.dovecot.info
protocols: imap imaps pop3 pop3s
disable_plaintext_auth: no
login_dir: /var/run/dovecot/login
login_executable(default): /usr/lib/dovecot/imap-login
login_executable(imap): /usr/lib/dovecot/imap-login
login_executable(pop3): /usr/lib/dovecot/pop3-login
login_greeting: Dovecot ready
login_process_per_connection: no
valid_chroot_dirs: /var/spool/mail
max_mail_processes: 2048
mail_location: maildir:/home/vmail/%d/%n
mail_executable(default): /usr/lib/dovecot/imap
mail_executable(imap): /usr/lib/dovecot/imap
mail_executable(pop3): /usr/lib/dovecot/pop3
mail_process_size: 1024
mail_plugin_dir(default): /usr/lib/dovecot/modules/imap
mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap
mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3
imap_client_workarounds: delay-newmail outlook-idle netscape-eoh
pop3_uidl_format(default):
pop3_uidl_format(imap):
pop3_uidl_format(pop3): %08Xu%08Xv
pop3_client_workarounds: outlook-no-nuls oe-ns-eoh
namespace:
  type: private
  separator: .
  prefix: INBOX.
  inbox: yes
auth default_with_listener:
  mechanisms: plain login
  verbose: yes
  debug: yes
  passdb:
    driver: sql
    args: /etc/dovecot/dovecot-sql.conf
  userdb:
    driver: static
    args: uid=5000 gid=5000 home=/home/vmail/%d/%n allow_all_users=yes
  socket:
    type: listen
    client:
      path: /var/spool/postfix/private/auth
      mode: 432
      user: postfix
      group: postfix
    master:
      path: /var/run/dovecot/auth-master
      mode: 384
      user: vmail