Hi Dovecot 2.1.7 Postfix 2.9.6 Maildir backend, emails filtered by a Postfix frontend (Sqlgrey, Amavis). Lmtp delivering emails using a simple sieve script. Ubuntu 12.04 VMware virtual server.

When email are CCed to other recipients on the same domain (the same backend), sometimes they are lost. We hosts approx. 1500 mailboxes, the problem occurs one or two times a day.

Recently I changed the frontend, the previous one was delivering one email for each recipient, we had a couple of error per year, we thought it was due to client-side error. The frequency increased with the new frontend, no more “splitting” messages for more than one recipient.

The following sample is from a client using a POP3 connection, leaving emails on server.

the Postfix mail.log May 11 01:26:55 lmail01 postfix/qmgr[7054]: 96E9CA6628: from=sender@external.com, size=11822371, nrcpt=2 (queue active) May 11 01:26:55 lmail01 postfix/lmtp[3106]: 96E9CA6628: to=user-one@domain.com, relay=mail4.robinson.it[private/dovecot-lmtp], delay=0.64, delays=0.45/0/0/0.19, dsn=2.0.0, status=sent (250 2.0.0 user-one@domain.com 0vNzHyptMlezHgAAk+lh+g Saved) May 11 01:26:55 lmail01 postfix/lmtp[3106]: 96E9CA6628: to=user-two@domain.com>, relay=mail4.robinson.it[private/dovecot-lmtp], delay=0.74, delays=0.45/0/0/0.29, dsn=2.0.0, status=sent (250 2.0.0 user-two@domain.com> 0vNzHyptMlezHgAAk+lh+g Saved) May 11 01:26:55 lmail01 postfix/qmgr[7054]: 96E9CA6628: removed

the dovecot-info.log May 11 01:26:55 lmtp(7859, user-one@domain.com): Info: 0vNzHyptMlezHgAAk+lh+g: sieve: msgid=003A2D931FFF0E48A2314A1ADC87E23E8E4BA1DE@t49-ms-exmb02.INTRANET.SAKSROOT.SAKSINC.com: stored mail into mailbox 'INBOX' May 11 01:26:55 lmtp(7859, user-two@domain.com): Info: 0vNzHyptMlezHgAAk+lh+g: sieve: msgid=003A2D931FFF0E48A2314A1ADC87E23E8E4BA1DE@t49-ms-exmb02.INTRANET.SAKSROOT.SAKSINC.com: stored mail into mailbox 'INBOX'

I cannot find the email 0vNzHyptMlezHgAAk+lh+g for user-two@domain.commailto:user-two@domain.com, nor I cannot suppose problems on the client, nothing changed on the back-end.

Please let me know if you need some more info or config dump.

Any help will be appreciated

Paolo Rinaldo

Dovecot config: # 2.1.7: /etc/dovecot/dovecot.conf # OS: Linux 3.11.0-15-generic x86_64 Ubuntu 12.04.4 LTS auth_mechanisms = plain login debug_log_path = /var/log/dovecot/dovecot-debug.log disable_plaintext_auth = no info_log_path = /var/log/dovecot/dovecot-info.log log_path = /var/log/dovecot/dovecot.log mail_plugins = " quota" managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave namespace inbox { inbox = yes location = prefix = INBOX. separator = . } passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } plugin { autocreate = INBOX.Trash autocreate2 = INBOX.Spam autocreate3 = INBOX.Sent autocreate4 = INBOX.Drafts autosubscribe = INBOX.Trash autosubscribe2 = INBOX.Spam autosubscribe3 = INBOX.Sent autosubscribe4 = INBOX.Drafts quota = maildir:User quota quota_exceeded_message = Impossibile consegnare il messaggio: spazio insufficiente sulla casella di destinazione quota_grace = 10%% quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_global_path = /var/lib/dovecot/sieve/spam.sieve } protocols = imap pop3 lmtp sieve service auth-worker { user = vmail } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } user = dovecot } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service quota-warning { executable = script /usr/local/bin/quota-warning.sh unix_listener quota-warning { user = vmail } user = vmail } ssl_cert =

The spam.sieve

require ["fileinto", "envelope", "subaddress", "mailbox"]; if envelope :detail "to" "spam"{ fileinto :create "INBOX.Spam"; }