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2012-Jul-22 11:59 UTC

[Dovecot] maildir_copy_with_hardlinks on v.2.0.19

Hi,

I'm trying to get the so-called "single instance store" (I think
cyrus
has got the name for the first time) with dovecot --version = 2.0.19
binary package installed from ubuntu 12.04 lts official repo.

I have checked that "maildir_copy_with_hardlinks" is enabled
("dovecot
-a|grep hard" shows "yes") then I have installed and enabled the
lmtp
component of dovecot. The configuration "dovecot -n" is pasted here:
http://paste.lug.ro/131180

Also in the same paste is a strace against dovecot and childrent
showing evidence of the MTA delivering a single copy of the message
via LMTP with multiple RCPT TO: headers.

However when looking in the Maildir, I see the mail break down into
three separate files instead of expected hardlinked files ("stat" and
"ls" shows one single link count, inodes are different)

Given the above data, what (am I | dovecot is) doing wrong?

Please cc me if you need additional input when replying as I'm not
subscribed to the list (I'll watch the thread online only)
Many thanks in advance.

Charles Marcus

2012-Jul-23 09:06 UTC

head link

[Dovecot] maildir_copy_with_hardlinks on v.2.0.19

On 2012-07-22 7:59 AM, mailing list subscriber 
<mailinglists35 at gmail.com> wrote:> I'm trying to get the so-called "single instance store" (I
think cyrus
> has got the name for the first time) with dovecot --version = 2.0.19
> binary package installed from ubuntu 12.04 lts official repo.
For advanced/newest features, you would be well advised to use the most 
current stable version, which is currently 2.1.8...
> I have checked that "maildir_copy_with_hardlinks" is enabled
("dovecot
> -a|grep hard" shows "yes") then I have installed and enabled
the lmtp
> component of dovecot. The configuration "dovecot -n" is pasted
here:
> http://paste.lug.ro/131180
Please don't do that - just paste the output in the email body, it is 
much easier to read/respond and try to help you.

-- 

Best regards,

Charles

mailing list subscriber

2012-Jul-23 19:12 UTC

head link

[Dovecot] maildir_copy_with_hardlinks on v.2.0.19

On Sun, Jul 22, 2012 at 2:59 PM, mailing list subscriber
<mailinglists35 at gmail.com> wrote:> Hi,
>
> I'm trying to get the so-called "single instance store" (I
think cyrus
> has got the name for the first time) with dovecot --version = 2.0.19
> binary package installed from ubuntu 12.04 lts official repo.
As requested, here is my update. As you can see I am running now the
latest release however emails delivered through lmtp gets split into
different files instead of expected hardlinked files.

Please pay attention as I'm commenting in-between different pasted outputs:

# 2.1.8 (30b0d6b1c581): /etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-26-generic x86_64 Ubuntu 12.04 LTS
auth_username_format = %Ln
auth_verbose = yes
auth_verbose_passwords = plain
mail_location = maildir:~/Maildir
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 }
passdb {
  driver = pam
}
plugin {
  autocreate = Inbox
  autocreate2 = Sent
  autocreate3 = Drafts
  autocreate4 = Spam
  autocreate5 = Trash
  autosubscribe = Inbox
  autosubscribe2 = Sent
  autosubscribe3 = Drafts
  autosubscribe4 = Spam
  autosubscribe5 = Trash
  mail_log_events = delete expunge mailbox_delete mailbox_rename
  mail_log_fields = uid box msgid size
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
}
protocols = imap pop3 sieve lmtp
service auth {
  unix_listener /var/spool/postfix/private/dovecot-auth {
    group = postfix
    mode = 0660
    user = postfix
  }
}
service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
    group = postfix
    mode = 0660
    user = postfix
  }
}
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_cipher_list
ALL:!LOW:!SSLv2:ALL:!aNULL:!ADH:!eNULL:!EXP:RC4+RSA:+HIGH:+MEDIUM
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
  driver = passwd
}
verbose_proctitle = yes
protocol imap {
  imap_client_workarounds = delay-newmail
  mail_max_userip_connections = 10
  mail_plugins = " autocreate"
}
protocol pop3 {
  mail_max_userip_connections = 10
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
}
protocol lda {
  deliver_log_format = msgid=%m: %$
  mail_plugins = sieve
  postmaster_address = postmaster
  quota_full_tempfail = yes
  rejection_reason = Your message to <%t> was automatically rejected:%n%r
}

for your pleasure, here is the transaction (note the same queue id and
a single lmtp session for all three recipients)

Jul 23 21:47:32 imap postfix/qmgr[27463]: 6746C27C687:
from=<root at imap.mydomain.ro>, size=532, nrcpt=3 (queue active)
Jul 23 21:47:32 imap dovecot: lmtp(40609): Connect from local
Jul 23 21:47:32 imap dovecot: lmtp(40609, anotheruser):
pnuDHkScDVChngAA7nOI2A:
msgid=<20120723184732.6746C27C687 at imap.mydomain.ro>: saved mail to
INBOX
Jul 23 21:47:32 imap postfix/lmtp[40608]: 6746C27C687:
to=<anotheruser at mydomain.ro>,
relay=imap.mydomain.ro[private/dovecot-lmtp], delay=0.26,
delays=0.15/0.01/0/0.1, dsn=2.0.0, status=sent (250 2.0.0
<anotheruser at mydomain.ro> pnuDHkScDVChngAA7nOI2A Saved)
Jul 23 21:47:32 imap dovecot: lmtp(40609, firstuser):
pnuDHkScDVChngAA7nOI2A:
msgid=<20120723184732.6746C27C687 at imap.mydomain.ro>: saved mail to
INBOX
Jul 23 21:47:32 imap postfix/lmtp[40608]: 6746C27C687:
to=<firstuser at mydomain.ro>,
relay=imap.mydomain.ro[private/dovecot-lmtp], delay=0.37,
delays=0.15/0.01/0/0.2, dsn=2.0.0, status=sent (250 2.0.0
<firstuser at mydomain.ro> pnuDHkScDVChngAA7nOI2A Saved)
Jul 23 21:47:32 imap dovecot: lmtp(40609, firstuser):
pnuDHkScDVChngAA7nOI2A:
msgid=<20120723184732.6746C27C687 at imap.mydomain.ro>: saved mail to
INBOX
Jul 23 21:47:32 imap postfix/lmtp[40608]: 6746C27C687:
to=<firstuser at anothermydomain.ro>,
relay=imap.mydomain.ro[private/dovecot-lmtp], delay=0.44,
delays=0.15/0.01/0/0.28, dsn=2.0.0, status=sent (250 2.0.0
<firstuser at anothermydomain.ro> pnuDHkScDVChngAA7nOI2A Saved)
Jul 23 21:47:32 imap dovecot: lmtp(40609): Disconnect from local:
Client quit (in reset)
Jul 23 21:47:32 imap postfix/qmgr[27463]: 6746C27C687: removed

for whoever wants to blame postfix 2.9.3 without reason, here is the postconf -n

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
home_mailbox = Maildir/
html_directory = /usr/share/doc/postfix/html
inet_interfaces = all
mailbox_command = /usr/lib/dovecot/deliver -c
/etc/dovecot/conf.d/01-mail-stack-delivery.conf -m "${EXTENSION}"
mailbox_size_limit = 0
mydestination = imap.mydomain.ro, localhost.mydomain.ro, localhost
myhostname = imap.mydomain.ro
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
readme_directory = /usr/share/doc/postfix
recipient_delimiter = +
relayhost smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_use_tls = yes
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_recipient_restrictions = reject_unknown_sender_domain,
reject_unknown_recipient_domain, reject_unauth_pipelining,
permit_mynetworks, permit_sasl_authenticated,
reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_path = private/dovecot-auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = reject_unknown_sender_domain
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/ssl/certs/ssl-mail.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-mail.key
smtpd_tls_mandatory_ciphers = medium
smtpd_tls_mandatory_protocols = SSLv3, TLSv1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
tls_random_source = dev:/dev/urandom
virtual_alias_maps = hash:/etc/postfix/valid_recipients_alias
virtual_mailbox_domains = mydomain.ro, anothermydomain.ro
virtual_mailbox_maps = $virtual_alias_maps
virtual_transport = lmtp:unix:private/dovecot-lmtp

and the dialogue between postfix lmtp client and dovecot lmtp server:

Process 40677 attached (waiting for parent)
Process 40677 resumed (parent 40562 ready)
[pid 40676] write(4,
"VERSION\tconfig\t2\t0\nREQ\tmodule=lmtp\tservice=lmtp\n", 48) = 48
[pid 40676] read(4,  <unfinished ...>
[Process 40678 attached
Process 40677 suspended
[pid 40678] write(1, "SIEVE: fileinto reject envelope
encoded-character vacation subaddress comparator-i;ascii-numeric
relational regex imap4flags copy include variables body enotify
environment mailbox date ihave, NOTIFY: mailto\n", 208) = 208
Process 40677 resumed
Process 40678 detached
[pid 40677] --- SIGCHLD (Child exited) @ 0 (0) ---
[pid 40677] read(11, "SIEVE: fileinto reject envelope
encoded-character vacation subaddress comparator-i;ascii-numeric
relational regex imap4flags copy include variables body enotify
environment mailbox date ihave, NOTIFY: mailto\n", 4096) = 208
[pid 40677] read(11, "", 3888)          = 0
[pid 40677] read(21, "", 1024)          = 0
[pid 40677] read(21, "", 1024)          = 0
[pid 40677] read(10, "# /etc/nsswitch.conf\n#\n# Example configuration
of GNU Name Service Switch functionality.\n# If you have the
`glibc-doc-reference' and `info' packages installed, try:\n# `info
libc \"Name Service Switch\"' for information about this
file.\n\npasswd:         compat\ngroup:          compat\nshadow:
  compat\n\nhosts:          files dns\nnetworks:
files\n\nprotocols:      db files\nservices:       db files\nethers:
      db files\nrpc:            db files\n\nnetgroup:       nis\n",
4096) = 475
[pid 40677] read(10, "", 4096)          = 0
[pid 40677] read(10,
"VERSION\tconfig\t2\t0\nREQ\tmodule=lmtp\tservice=lmtp\n", 1024) = 48
[pid 40677] write(10,
"\nnamespace=inbox\nnamespace/inbox/name=inbox\nnamespace/inbox/inbox=yes\nplugin=\nplugin/sieve=~/.dovecot.sieve\nplugin/sieve_dir=~/sieve\nplugin/autocreate=Inbox\nplugin/autocreate2=Sent\nplugin/autocreate3=Drafts\nplugin/autocreate4=Spam\nplugin/autocreate5=Trash\nplugin/autosubscribe=Inbox\nplugin/autosubscribe2=Sent\nplugin/autosubscribe3=Drafts\nplugin/autosubscribe4=Spam\nplugin/autosubscribe5=Trash\nplugin/mail_log_events=delete
expunge mailbox_delete mailbox_rename\nplugin/mail_log_fields=uid box
msgid
size\nmail_location=maildir:~/Maildir\nmaildir_copy_with_hardlinks=yes\nverbose_proctitle=yes\n\n",
591) = 591
[pid 40676] <... read resumed>
"\nnamespace=inbox\nnamespace/inbox/name=inbox\nnamespace/inbox/inbox=yes\nplugin=\nplugin/sieve=~/.dovecot.sieve\nplugin/sieve_dir=~/sieve\nplugin/autocreate=Inbox\nplugin/autocreate2=Sent\nplugin/autocreate3=Drafts\nplugin/autocreate4=Spam\nplugin/autocreate5=Trash\nplugin/autosubscribe=Inbox\nplugin/autosubscribe2=Sent\nplugin/autosubscribe3=Drafts\nplugin/autosubscribe4=Spam\nplugin/autosubscribe5=Trash\nplugin/mail_log_events=delete
expunge mailbox_delete mailbox_rename\nplugin/mail_log_fields=uid box
msgid
size\nmail_location=maildir:~/Maildir\nmaildir_copy_with_hardlinks=yes\nverbose_proctitle=yes\n\n",
8192) = 591
[pid 40676] write(5, "\344\236\0\0\7\0\0\0\1\0\0\0", 12) = 12
[pid 40562] read(128, "\344\236\0\0\7\0\0\0\1\0\0\0", 1020) = 12
[pid 40676] write(5, "\344\236\0\0\7\0\0\0\0\0\0\0", 12) = 12
[pid 40562] read(128, "\344\236\0\0\7\0\0\0\0\0\0\0", 1020) = 12
[pid 40676] write(4,
"VERSION\tconfig\t2\t0\nREQ\tmodule=lmtp\tservice=lmtp\tuser=\n", 54)
= 54
[pid 40677] read(10,
"VERSION\tconfig\t2\t0\nREQ\tmodule=lmtp\tservice=lmtp\tuser=\n", 976)
= 54
[pid 40676] read(4,  <unfinished ...>
[pid 40677] write(10,
"\nnamespace=inbox\nnamespace/inbox/name=inbox\nnamespace/inbox/inbox=yes\nplugin=\nplugin/sieve=~/.dovecot.sieve\nplugin/sieve_dir=~/sieve\nplugin/autocreate=Inbox\nplugin/autocreate2=Sent\nplugin/autocreate3=Drafts\nplugin/autocreate4=Spam\nplugin/autocreate5=Trash\nplugin/autosubscribe=Inbox\nplugin/autosubscribe2=Sent\nplugin/autosubscribe3=Drafts\nplugin/autosubscribe4=Spam\nplugin/autosubscribe5=Trash\nplugin/mail_log_events=delete
expunge mailbox_delete mailbox_rename\nplugin/mail_log_fields=uid box
msgid
size\nmail_location=maildir:~/Maildir\nmaildir_copy_with_hardlinks=yes\nverbose_proctitle=yes\n\n",
591) = 591
[pid 40676] <... read resumed>
"\nnamespace=inbox\nnamespace/inbox/name=inbox\nnamespace/inbox/inbox=yes\nplugin=\nplugin/sieve=~/.dovecot.sieve\nplugin/sieve_dir=~/sieve\nplugin/autocreate=Inbox\nplugin/autocreate2=Sent\nplugin/autocreate3=Drafts\nplugin/autocreate4=Spam\nplugin/autocreate5=Trash\nplugin/autosubscribe=Inbox\nplugin/autosubscribe2=Sent\nplugin/autosubscribe3=Drafts\nplugin/autosubscribe4=Spam\nplugin/autosubscribe5=Trash\nplugin/mail_log_events=delete
expunge mailbox_delete mailbox_rename\nplugin/mail_log_fields=uid box
msgid
size\nmail_location=maildir:~/Maildir\nmaildir_copy_with_hardlinks=yes\nverbose_proctitle=yes\n\n",
8192) = 591
[pid 40676] read(13, "# Dynamic resolv.conf(5) file for glibc
resolver(3) generated by resolvconf(8)\n#     DO NOT EDIT THIS FILE BY
HAND -- YOUR CHANGES WILL BE OVERWRITTEN\nnameserver
192.168.17.1\nsearch mydomain.ro\n", 4096) = 202
[pid 40676] read(13, "", 4096)          = 0
[pid 40676] read(13, "# Dynamic resolv.conf(5) file for glibc
resolver(3) generated by resolvconf(8)\n#     DO NOT EDIT THIS FILE BY
HAND -- YOUR CHANGES WILL BE OVERWRITTEN\nnameserver
192.168.17.1\nsearch mydomain.ro\n", 4096) = 202
[pid 40676] read(13, "", 4096)          = 0
[pid 40676] read(13, "# /etc/nsswitch.conf\n#\n# Example configuration
of GNU Name Service Switch functionality.\n# If you have the
`glibc-doc-reference' and `info' packages installed, try:\n# `info
libc \"Name Service Switch\"' for information about this
file.\n\npasswd:         compat\ngroup:          compat\nshadow:
  compat\n\nhosts:          files dns\nnetworks:
files\n\nprotocols:      db files\nservices:       db files\nethers:
      db files\nrpc:            db files\n\nnetgroup:       nis\n",
4096) = 475
[pid 40676] read(13, "", 4096)          = 0
[pid 40676] read(13, "# The \"order\" line is only used by old
versions of the C library.\norder hosts,bind\nmulti on\n", 4096) = 92
[pid 40676] read(13, "", 4096)          = 0
[pid 40676] read(13,
"127.0.0.1\tlocalhost\n192.168.17.71\timap.mydomain.ro\timap\n\n# The
following lines are desirable for IPv6 capable hosts\n::1
ip6-localhost ip6-loopback\nfe00::0 ip6-localnet\nff00::0
ip6-mcastprefix\nff02::1 ip6-allnodes\nff02::2 ip6-allrouters\n",
4096) = 248
[pid 40676] read(13, "", 4096)          = 0
[pid 40676] write(12, "220 imap.mydomain.ro Dovecot ready.\r\n", 45) =
45
[pid 40676] write(2, "\1\01040676 prefix=lmtp(40676): \n", 29) = 29
[pid 40676] write(2, "\1\00240676 Connect from local\n", 27) = 27
[pid 40676] read(12, "LHLO imap.mydomain.ro\r\n", 4096) = 31
[pid 40676] write(12,
"250-imap.mydomain.ro\r\n250-8BITMIME\r\n250-ENHANCEDSTATUSCODES\r\n250
PIPELINING\r\n", 85) = 85
[pid 40676] read(12, "MAIL FROM:<root at imap.mydomain.ro>\r\nRCPT
TO:<anotheruser at mydomain.ro>\r\nRCPT
TO:<firstuser at mydomain.ro>\r\nRCPT
TO:<firstuser at anothermydomain.ro>\r\nDATA\r\n", 4065) = 163
Process 40679 attached
[pid 40676] write(13,
"VERSION\t1\t0\nUSER\t1\tanotheruser at mydomain.ro\tservice=lmtp\n",
64)
= 64
[pid 40679] read(4, "+\267\361\217", 4) = 4
[pid 40679] write(13, "VERSION\tconfig\t2\t0\nREQ\tmodule=auth\n", 35)
= 35
[pid 40679] read(13,  <unfinished ...>
[pid 40677] read(11, "VERSION\tconfig\t2\t0\nREQ\tmodule=auth\n",
1024) = 35
[pid 40677] write(11,
"\nverbose_proctitle=yes\nauth_mechanisms=plain\nauth_username_chars=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@\nauth_username_format=%Ln\nauth_verbose=yes\nauth_verbose_passwords=plain\npassdb=0\npassdb/0/driver=pam\nuserdb=0\nuserdb/0/driver=passwd\n\n",
266 <unfinished ...>
[pid 40679] <... read resumed>
"\nverbose_proctitle=yes\nauth_mechanisms=plain\nauth_username_chars=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@\nauth_username_format=%Ln\nauth_verbose=yes\nauth_verbose_passwords=plain\npassdb=0\npassdb/0/driver=pam\nuserdb=0\nuserdb/0/driver=passwd\n\n",
8192) = 266
[pid 40677] <... write resumed> )       = 266
[pid 40677] read(11, "", 989)           = 0
[pid 40562] read(7, "t\236\0\0\1\0\0\0\347\3\0\0", 1020) = 12
[pid 40679] write(13, "VERSION\tanvil\t1\t0\n", 18) = 18
[pid 40679] write(5, "\347\236\0\0\t\0\0\0\350\3\0\0", 12) = 12
[pid 40562] read(151, "\347\236\0\0\t\0\0\0\350\3\0\0", 1020) = 12
[pid 40679] write(17, "VERSION\t1\t1\nSPID\t40679\n", 23) = 23
[pid 40676] read(13, "VERSION\t1\t1\nSPID\t40679\n", 8192) = 23
[pid 40679] read(17,
"VERSION\t1\t0\nUSER\t1\tanotheruser at mydomain.ro\tservice=lmtp\n",
1024) = 64
[pid 40679] read(18, "# /etc/nsswitch.conf\n#\n# Example configuration
of GNU Name Service Switch functionality.\n# If you have the
`glibc-doc-reference' and `info' packages installed, try:\n# `info
libc \"Name Service Switch\"' for information about this
file.\n\npasswd:         compat\ngroup:          compat\nshadow:
  compat\n\nhosts:          files dns\nnetworks:
files\n\nprotocols:      db files\nservices:       db files\nethers:
      db files\nrpc:            db files\n\nnetgroup:       nis\n",
4096) = 475
[pid 40679] read(18, "", 4096)          = 0
[pid 40679] write(17,
"USER\t1\tanotheruser\tsystem_groups_user=anotheruser\tuid=1002\tgid=1002\thome=/home/anotheruser\n",
91) = 91
[pid 40676] read(13,
"USER\t1\tanotheruser\tsystem_groups_user=anotheruser\tuid=1002\tgid=1002\thome=/home/anotheruser\n",
8169) = 91
[pid 40676] write(13, "USER\t2\tfirstuser at
mydomain.ro\tservice=lmtp\n", 50) = 50
[pid 40679] read(17, "USER\t2\tfirstuser at
mydomain.ro\tservice=lmtp\n", 960) = 50
[pid 40679] write(17,
"USER\t2\tfirstuser\tsystem_groups_user=firstuser\tuid=1001\tgid=1001\thome=/home/firstuser\n",
85) = 85
[pid 40676] read(13,
"USER\t2\tfirstuser\tsystem_groups_user=firstuser\tuid=1001\tgid=1001\thome=/home/firstuser\n",
8192) = 85
[pid 40676] write(13,
"USER\t3\tfirstuser at anothermydomain.ro\tservice=lmtp\n", 39) = 39
[pid 40679] read(17,
"USER\t3\tfirstuser at anothermydomain.ro\tservice=lmtp\n", 910) = 39
[pid 40679] write(17,
"USER\t3\tfirstuser\tsystem_groups_user=firstuser\tuid=1001\tgid=1001\thome=/home/firstuser\n",
85) = 85
[pid 40676] read(13,
"USER\t3\tfirstuser\tsystem_groups_user=firstuser\tuid=1001\tgid=1001\thome=/home/firstuser\n",
8192) = 85
[pid 40676] read(12, 0x18977e2, 3902)   = -1 EAGAIN (Resource
temporarily unavailable)
[pid 40676] write(12, "250 2.1.0 OK\r\n250 2.1.5 OK\r\n250 2.1.5
OK\r\n250 2.1.5 OK\r\n354 OK\r\n", 64) = 64
[pid 40676] read(12, "Received: by imap.mydomain.ro (Postfix, from
userid 0)\r\n\tid AE18F27C687; Mon, 23 Jul 2012 22:00:37 +0300
(EEST)\r\nDate: Mon, 23 Jul 2012 22:00:37 +0300\r\nTo:
firstuser at anothermydomain.ro, firstuser at mydomain.ro\r\nCc:
anotheruser at mydomain.ro\r\nSubject: test\r\nUser-Agent: Heirloom mailx
12.5 6/20/10\r\nMIME-Version: 1.0\r\nContent-Type: text/plain;
charset=us-ascii\r\nContent-Transfer-Encoding:
quoted-printable\r\nMessage-Id:
<20120723190037.AE18F27C687 at imap.mydomain.ro>\r\nFrom:
root at imap.mydomain.ro (root)\r\n\r\n=\r\n.\r\nQUIT\r\n", 3902) = 541
[pid 40676] read(14, "65536\n", 31)     = 6
[pid 40676] write(16, "Return-Path: <root at
imap.mydomain.ro>\nReceived:
from imap.mydomain.ro\n\tby imap.mydomain.ro (Dovecot) with LMTP id
/RqJNFWfDVDkngAA7nOI2A\n\t; Mon, 23 Jul 2012 22:00:37 +0300\nReceived:
by imap.mydomain.ro (Postfix, from userid 0)\n\tid AE18F27C687; Mon,
23 Jul 2012 22:00:37 +0300 (EEST)\nDate: Mon, 23 Jul 2012 22:00:37
+0300\nTo: firstuser at anothermydomain.ro, firstuser at mydomain.ro\nCc:
anotheruser at mydomain.ro\nSubject: test\nUser-Agent: Heirloom mailx
12.5 6/20/10\nMIME-Version: 1.0\nContent-Type: text/plain;
charset=us-ascii\nContent-Transfer-Encoding:
quoted-printable\nMessage-Id:
<20120723190037.AE18F27C687 at imap.mydomain.ro>\nFrom:
root at imap.mydomain.ro (root)\n\n=\n", 713) = 713
[pid 40676] write(16, "40676:imap", 10) = 10
[pid 40676] write(15, "15
:1343070037.M903400P40676.imap,S=713,W=731\n", 46) = 46
[pid 40676] write(2, "\1\01040676 prefix=lmtp(40676, anotheruser):
\n", 42) = 42
[pid 40676] write(2, "\1\00240676 /RqJNFWfDVDkngAA7nOI2A:
msgid=<20120723190037.AE18F27C687 at imap.mydomain.ro>: saved mail to
INBOX\n", 113) = 113
[pid 40676] write(16, "40676:imap", 10) = 10
[pid 40676] write(12, "250 2.0.0 <anotheruser at mydomain.ro>
/RqJNFWfDVDkngAA7nOI2A Saved\r\n", 74) = 74
[pid 40676] read(18, "65536\n", 31)     = 6
[pid 40676] write(21, "Return-Path: <root at
imap.mydomain.ro>\nReceived:
from imap.mydomain.ro\n\tby imap.mydomain.ro (Dovecot) with LMTP id
/RqJNFWfDVDkngAA7nOI2A\n\t; Mon, 23 Jul 2012 22:00:37 +0300\nReceived:
by imap.mydomain.ro (Postfix, from userid 0)\n\tid AE18F27C687; Mon,
23 Jul 2012 22:00:37 +0300 (EEST)\nDate: Mon, 23 Jul 2012 22:00:37
+0300\nTo: firstuser at anothermydomain.ro, firstuser at mydomain.ro\nCc:
anotheruser at mydomain.ro\nSubject: test\nUser-Agent: Heirloom mailx
12.5 6/20/10\nMIME-Version: 1.0\nContent-Type: text/plain;
charset=us-ascii\nContent-Transfer-Encoding:
quoted-printable\nMessage-Id:
<20120723190037.AE18F27C687 at imap.mydomain.ro>\nFrom:
root at imap.mydomain.ro (root)\n\n=\n", 713) = 713
[pid 40676] write(21, "40676:imap", 10) = 10
[pid 40676] write(20, "29
:1343070037.M903400P40676.imap,S=713,W=731\n", 46) = 46
[pid 40676] write(2, "\1\01040676 prefix=lmtp(40676, firstuser): \n",
40) = 40
[pid 40676] write(2, "\1\00240676 /RqJNFWfDVDkngAA7nOI2A:
msgid=<20120723190037.AE18F27C687 at imap.mydomain.ro>: saved mail to
INBOX\n", 113) = 113
[pid 40676] write(12, "250 2.0.0 <firstuser at mydomain.ro>
/RqJNFWfDVDkngAA7nOI2A Saved\r\n", 72) = 72
[pid 40676] write(21, "Return-Path: <root at
imap.mydomain.ro>\nReceived:
from imap.mydomain.ro\n\tby imap.mydomain.ro (Dovecot) with LMTP id
/RqJNFWfDVDkngAA7nOI2A\n\t; Mon, 23 Jul 2012 22:00:37 +0300\nReceived:
by imap.mydomain.ro (Postfix, from userid 0)\n\tid AE18F27C687; Mon,
23 Jul 2012 22:00:37 +0300 (EEST)\nDate: Mon, 23 Jul 2012 22:00:37
+0300\nTo: firstuser at anothermydomain.ro, firstuser at mydomain.ro\nCc:
anotheruser at mydomain.ro\nSubject: test\nUser-Agent: Heirloom mailx
12.5 6/20/10\nMIME-Version: 1.0\nContent-Type: text/plain;
charset=us-ascii\nContent-Transfer-Encoding:
quoted-printable\nMessage-Id:
<20120723190037.AE18F27C687 at imap.mydomain.ro>\nFrom:
root at imap.mydomain.ro (root)\n\n=\n", 713) = 713
[pid 40676] write(21, "40676:imap", 10) = 10
[pid 40676] write(20, "30 :fe1a8934559f0d50e49e0000ee7388d8\n", 37) =
37
[pid 40676] write(2, "\1\01040676 prefix=lmtp(40676, firstuser): \n",
40) = 40
[pid 40676] write(2, "\1\00240676 /RqJNFWfDVDkngAA7nOI2A:
msgid=<20120723190037.AE18F27C687 at imap.mydomain.ro>: saved mail to
INBOX\n", 113) = 113
[pid 40676] write(12, "250 2.0.0 <firstuser at anothermydomain.ro>
/RqJNFWfDVDkngAA7nOI2A Saved\r\n", 61) = 61
[pid 40676] write(2, "\1\01040676 prefix=lmtp(40676): \n", 29) = 29
[pid 40676] write(2, "\1\00240676 Disconnect from local: Client quit
(in reset)\n", 54) = 54
[pid 40676] write(12, "221 2.0.0 Client quit\r\n", 23) = 23

for the sake of readability i stripped elf binary reads and
certificates from the strace output.
note the dovecot lmtp process reading a single email with three RCPT
TO's and writing three times three different files instead of writing
content one time and hardlinking two times.

anyone care to shed a light?
thanks.

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