2.3.1 with quota and lmtp; message may be sent more than once

[Christos Chatzaras]

I had the same problem and the only workaround I found was to change this to postfix main.cf :

default_destination_recipient_limit = 1



> On 1 May 2018, at 11:12, Frank Ebert <frank.ebert at freenet.de> wrote:
> 
> Hi,
> 
> I have another problem with dovecot 2.3.1 on FreeBSD (smtpd is postfix
> 3.3.0). When one mail is sent with different recipients and the quota
> limit of one user is exceeded, the message will be delivered repeatedly
> to all users. The queue from postfix says:
> 
> (lost connection with mailserver.foo.bar[private/lmtp-dovecot] while
> sending end of data -- message may be sent more than once)
> 
> The problem started with dovecot 2.3.1. With 2.2.3x everything was fine.
> 
> Any ideas?
> 
> Thanx
> Frank
> 
> doveconf -n:
> 
> auth_mechanisms = plain login
> auth_use_winbind = yes
> auth_winbind_helper_path = /usr/local/bin/ntlm_auth
> disable_plaintext_auth = no
> info_log_path = /var/log/dovecot
> listen = *
> mail_location = mdbox:~/mdbox
> mail_plugins = zlib quota acl mail_log notify
> managesieve_notify_capability = mailto
> managesieve_sieve_capability = fileinto reject envelope
> encoded-character vacati on subaddress comparator-i;ascii-numeric
> relational regex imap4flags copy includ e variables body enotify
> environment mailbox date index ihave duplicate mime for everypart
> extracttext
> namespace {
> location = mdbox:/home/vmail/foo.domain/foo/mdbox
> prefix = Foo/
> separator = /
> subscriptions = yes
> type = public
> }
> namespace {
> location = mdbox:/home/vmail/bar.domain/bar/mdbox
> prefix = Bar/
> separator = /
> subscriptions = yes
> type = public
> }
> namespace {
> location = mdbox:/home/vmail/foobar.domain/foobar/mdbox
> prefix = Foobar/
> separator = /
> subscriptions = yes
> type = public
> }
> namespace inbox {
> inbox = yes
> location =
> mailbox Drafts {
>   auto = subscribe
>   special_use = \Drafts
> }
> mailbox Junk {
>   special_use = \Junk
> }
> mailbox Sent {
>   auto = subscribe
>   special_use = \Sent
> }
> mailbox "Sent Messages" {
>   special_use = \Sent
> }
> mailbox Trash {
>   auto = subscribe
>   special_use = \Trash
> }
> prefix = INBOX/
> separator = /
> }
> passdb {
> args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
> driver = ldap
> }
> plugin {
> acl = vfile:/usr/local/etc/dovecot/global-acls
> acl_shared_dict = file:/var/lib/dovecot/shared-mailboxes
> mail_log_events = flag_change delete undelete expunge copy
> mailbox_delete mail box_rename
> mail_log_fields = uid box msgid size flags
> quota = dict:User quota::file:%h/dovecot-quota
> quota_warning = storage=95%% quota-warning 95 %u
> quota_warning2 = storage=80%% quota-warning 80 %u
> sieve = ~/.dovecot.sieve
> sieve_dir = ~/sieve
> stats_command_min_time = 1 mins
> stats_domain_min_time = 12 hours
> stats_ip_min_time = 12 hours
> stats_memory_limit = 16 M
> stats_refresh = 30
> stats_session_min_time = 15 mins
> stats_track_cmds = yes
> stats_user_min_time = 1 hours
> zlib_save = gz
> zlib_save_level = 6
> }
> postmaster_address = postmaster at foo.bar
> protocols = imap lmtp sieve
> service auth {
> unix_listener /var/spool/postfix/private/auth {
>   mode = 0666
> }
> unix_listener auth-userdb {
>   group = vmail
>   user = vmail
> }
> }
> service lmtp {
> unix_listener /var/spool/postfix/private/lmtp-dovecot {
>   group = postfix
>   user = postfix
> }
> }
> service managesieve-login {
> inet_listener sieve {
>   port = 4190
> }
> process_min_avail = 0
> service_count = 0
> }
> service managesieve {
> process_limit = 1024
> }
> service quota-warning {
> executable = script /usr/local/bin/quota-warning.sh
> unix_listener quota-warning {
>   user = vmail
> }
> user = vmail
> }
> service stats {
> fifo_listener stats-mail {
>   mode = 0600
>   user = vmail
> }
> }
> ssl_cert = </etc/ssl/certs/dovecot.pem
> ssl_dh =  # hidden, use -P to show it
> ssl_key =  # hidden, use -P to show it
> userdb {
> driver = prefetch
> }
> userdb {
> args = /usr/local/etc/dovecot/dovecot-ldap-userdb.conf.ext
> driver = ldap
> }
> protocol lmtp {
> mail_plugins = zlib quota acl mail_log notify sieve
> }
> protocol lda {
> mail_plugins = zlib quota acl mail_log notify sieve
> }
> protocol imap {
> mail_plugins = zlib quota acl mail_log notify imap_zlib imap_quota
> imap_acl }