[Dovecot] mail looping

[Steven F Siirila]

We are running Postfix 2.3.3 and Dovecot 1.0-RC27 on a Solaris 10 server.
We use the Dovecot LDA for local delivery.  Problems arise with looping mail
whenever a user's .forward contains a reference to themselves.  This most
frequently occurs when a user sets up a vacation since it then puts this in
their .forward file:

\username, "|/usr/bin/vacation username"

The vacation program runs fine, and sends a notice back to the message
originator, but when an attempt is made to deliver the message locally,
it fails with:

	Mar 21 13:02:16 myhost.mydomain postfix/local[13373]:
	3DF5A2C63: to=<systest at myhost.mydomain>, relay=local,
	delay=0.15, delays=0.12/0/0/0.03, dsn=5.4.6,
	status=bounced (mail forwarding loop for systest at myhost.mydomain)

Any ideas?  I hope it's something stupid I've overlooked...

Noteworthy line in postfix/main.cf:

mailbox_command = /opt/dovecot/libexec/dovecot/deliver -f "$SENDER"

and finally, dovecot -n:

# /etc/opt/dovecot/dovecot.conf
syslog_facility: local6
protocols: imap imaps pop3 pop3s
listen(default): *:143
listen(imap): *:143
listen(pop3): *:110
ssl_listen(default): *:993
ssl_listen(imap): *:993
ssl_listen(pop3): *:995
ssl_cert_file: /etc/opt/openssl/certs/dovecot.pem
ssl_key_file: /etc/opt/openssl/private/dovecot.pem
shutdown_clients: no
login_dir: /var/opt/dovecot/run/dovecot/login
login_executable(default): /opt/dovecot/libexec/dovecot/imap-login
login_executable(imap): /opt/dovecot/libexec/dovecot/imap-login
login_executable(pop3): /opt/dovecot/libexec/dovecot/pop3-login
login_processes_count: 32
login_max_processes_count: 4096
max_mail_processes: 8192
first_valid_uid: 100
default_mail_env: mbox:~/:INBOX=/var/mail/%u
mail_location: mbox:~/:INBOX=/var/mail/%u
mail_full_filesystem_access: yes
mbox_lazy_writes: no
mail_executable(default): /opt/dovecot/libexec/dovecot/imap
mail_executable(imap): /opt/dovecot/libexec/dovecot/imap
mail_executable(pop3): /opt/dovecot/libexec/dovecot/pop3
mail_plugin_dir(default): /opt/dovecot/lib/dovecot/imap
mail_plugin_dir(imap): /opt/dovecot/lib/dovecot/imap
mail_plugin_dir(pop3): /opt/dovecot/lib/dovecot/pop3
imap_client_workarounds(default): delay-newmail outlook-idle tb-extra-mailbox-sep
imap_client_workarounds(imap): delay-newmail outlook-idle tb-extra-mailbox-sep
imap_client_workarounds(pop3): outlook-idle
pop3_uidl_format(default): 
pop3_uidl_format(imap): 
pop3_uidl_format(pop3): %08Xu%08Xv
namespace:
  type: private
  separator: /
  location: mbox:~/:INBOX=/var/mail/%u
  inbox: yes
  hidden: yes
auth default:
  username_format: %Lu
  verbose: yes
  debug: yes
  passdb:
    driver: pam
    args: session=yes *
  userdb:
    driver: passwd

-- 

Steven F. Siirila			Office: Lind Hall, Room 130B
Internet Services			E-mail: sfs at umn.edu
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University of Minnesota			Fax: (612) 626-7593