[Dovecot] dovecot-lmtp does not work

[He Shiming]

Dear Community,

I've got a weird problem regarding lmtp setup with dovecot 2.0.19 on ubuntu
12.04.2 LTS. My reference of the configuration is at
https://library.linode.com/email/postfix/postfix2.9.6-dovecot2.0.19-mysql ,
and my configuration is identical to it with the exception of opening the
110 pop3 port, and enabling plain text auth. Everything from imap, smtp,
pop3 (including auth) works except for lmtp.

I saw thousands of the following messages in /var/log/mail.log:

May 31 09:05:24 postfix/lmtp[3664]: 2FD80321F4: to=<myaddress at me.com>,
relay=none, delay=0.41, delays=0.41/0/0/0, dsn=4.4.1, status=deferred
(connect to me.com[private/dovecot-lmtp]: No such file or directory)

And it happens when an incoming email is received.

Here's the output of configuration:

root at prosp:/etc/dovecot/conf.d# dovecot -n
# 2.0.19: /etc/dovecot/dovecot.conf
# OS: Linux 3.8.4-linode50 i686 Ubuntu 12.04.2 LTS ext3
auth_mechanisms = plain login
disable_plaintext_auth = no
mail_location = maildir:/var/mail/vhosts/%d/%n
mail_privileged_group = mail
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
passdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
plugin {
sieve = ~/.dovecot.sieve
sieve_dir = ~/sieve
}
protocols = imap pop3 sieve
service auth-worker {
user = vmail
}
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0666
user = postfix
}
unix_listener /var/spool/postfix/private/dovecot-auth {
group = postfix
mode = 0660
user = postfix
}
unix_listener auth-userdb {
mode = 0600
user = vmail
}
user = dovecot
}
service imap-login {
inet_listener imap {
port = 0
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
}
service pop3-login {
inet_listener pop3 {
port = 110
}
}
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 {
args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n
driver = static
}
protocol imap {
imap_client_workarounds = delay-newmail
mail_max_userip_connections = 10
}
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
}

This problem has been discussed here:
http://serverfault.com/questions/512219/dovecot-lmtp-does-not-exist . I've
then tried switching from unix socket to inet listener, and still got the
same result. I cannot get lmtp service to start.

I'm also seeing no errors in the log when dovecot is restarted (see the
above link for the log).

I'm wondering how do I go about troubleshooting this problem? What might be
the possible cause? Is it possible for dovecot to output verbose logs
regarding service startups?

Thank you.

[Andy R]

Hi there,

Have you added 'lmtp' to the protocols line in dovecot.conf ? It's not
listed in your doveconf -n.

IE :-

# Protocols we want to be serving.
#protocols = imap pop3 sieve
protocols = imap pop3 sieve lmtp


For logging, set "mail_debug = yes" (in
/etc/dovecot/conf.d/10-logging.conf on my system).

Post by He Shiming
Dear Community,
I've got a weird problem regarding lmtp setup with dovecot 2.0.19 on ubuntu
12.04.2 LTS. My reference of the configuration is at
https://library.linode.com/email/postfix/postfix2.9.6-dovecot2.0.19-mysql ,
and my configuration is identical to it with the exception of opening the
110 pop3 port, and enabling plain text auth. Everything from imap, smtp,
pop3 (including auth) works except for lmtp.
May 31 09:05:24 postfix/lmtp[3664]: 2FD80321F4: to=<myaddress at me.com>,
relay=none, delay=0.41, delays=0.41/0/0/0, dsn=4.4.1, status=deferred
(connect to me.com[private/dovecot-lmtp]: No such file or directory)
And it happens when an incoming email is received.
root at prosp:/etc/dovecot/conf.d# dovecot -n
# 2.0.19: /etc/dovecot/dovecot.conf
# OS: Linux 3.8.4-linode50 i686 Ubuntu 12.04.2 LTS ext3
auth_mechanisms = plain login
disable_plaintext_auth = no
mail_location = maildir:/var/mail/vhosts/%d/%n
mail_privileged_group = mail
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
passdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
plugin {
sieve = ~/.dovecot.sieve
sieve_dir = ~/sieve
}
protocols = imap pop3 sieve
service auth-worker {
user = vmail
}
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0666
user = postfix
}
unix_listener /var/spool/postfix/private/dovecot-auth {
group = postfix
mode = 0660
user = postfix
}
unix_listener auth-userdb {
mode = 0600
user = vmail
}
user = dovecot
}
service imap-login {
inet_listener imap {
port = 0
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
}
service pop3-login {
inet_listener pop3 {
port = 110
}
}
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 {
args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n
driver = static
}
protocol imap {
imap_client_workarounds = delay-newmail
mail_max_userip_connections = 10
}
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
}
http://serverfault.com/questions/512219/dovecot-lmtp-does-not-exist . I've
then tried switching from unix socket to inet listener, and still got the
same result. I cannot get lmtp service to start.
I'm also seeing no errors in the log when dovecot is restarted (see the
above link for the log).
I'm wondering how do I go about troubleshooting this problem? What might be
the possible cause? Is it possible for dovecot to output verbose logs
regarding service startups?
Thank you.

[He Shiming]

Thanks Andy. But I do have this line 'protocols = lmtp imap pop3' in
dovecot.conf. This line doesn't contain 'sieve' either. Is it possible for
other config file to override this line?

Post by Andy R
Hi there,
Have you added 'lmtp' to the protocols line in dovecot.conf ? It's not
listed in your doveconf -n.
IE :-
# Protocols we want to be serving.
#protocols = imap pop3 sieve
protocols = imap pop3 sieve lmtp
For logging, set "mail_debug = yes" (in /etc/dovecot/conf.d/10-**logging.conf
on my system).

Post by He Shiming
Dear Community,
I've got a weird problem regarding lmtp setup with dovecot 2.0.19 on ubuntu
12.04.2 LTS. My reference of the configuration is at
https://library.linode.com/**email/postfix/postfix2.9.6-**
dovecot2.0.19-mysql<https://library.linode.com/email/postfix/postfix2.9.6-dovecot2.0.19-mysql>,
and my configuration is identical to it with the exception of opening the
110 pop3 port, and enabling plain text auth. Everything from imap, smtp,
pop3 (including auth) works except for lmtp.
May 31 09:05:24 postfix/lmtp[3664]: 2FD80321F4: to=<myaddress at me.com>,
relay=none, delay=0.41, delays=0.41/0/0/0, dsn=4.4.1, status=deferred
(connect to me.com[private/dovecot-lmtp]: No such file or directory)
And it happens when an incoming email is received.
root at prosp:/etc/dovecot/conf.**d# dovecot -n
# 2.0.19: /etc/dovecot/dovecot.conf
# OS: Linux 3.8.4-linode50 i686 Ubuntu 12.04.2 LTS ext3
auth_mechanisms = plain login
disable_plaintext_auth = no
mail_location = maildir:/var/mail/vhosts/%d/%n
mail_privileged_group = mail
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
passdb {
args = /etc/dovecot/dovecot-sql.conf.**ext
driver = sql
}
plugin {
sieve = ~/.dovecot.sieve
sieve_dir = ~/sieve
}
protocols = imap pop3 sieve
service auth-worker {
user = vmail
}
service auth {
unix_listener /var/spool/postfix/private/**auth {
group = postfix
mode = 0666
user = postfix
}
unix_listener /var/spool/postfix/private/**dovecot-auth {
group = postfix
mode = 0660
user = postfix
}
unix_listener auth-userdb {
mode = 0600
user = vmail
}
user = dovecot
}
service imap-login {
inet_listener imap {
port = 0
}
}
service lmtp {
unix_listener /var/spool/postfix/private/**dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
}
service pop3-login {
inet_listener pop3 {
port = 110
}
}
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 {
args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n
driver = static
}
protocol imap {
imap_client_workarounds = delay-newmail
mail_max_userip_connections = 10
}
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
}
http://serverfault.com/**questions/512219/dovecot-lmtp-**does-not-exist<http://serverfault.com/questions/512219/dovecot-lmtp-does-not-exist>. I've
then tried switching from unix socket to inet listener, and still got the
same result. I cannot get lmtp service to start.
I'm also seeing no errors in the log when dovecot is restarted (see the
above link for the log).
I'm wondering how do I go about troubleshooting this problem? What might be
the possible cause? Is it possible for dovecot to output verbose logs
regarding service startups?
Thank you.

[He Shiming]

I discovered that the line is actually overridden
by /etc/dovecot/conf.d/01-mail-stack-delivery.conf:protocols = imap pop3
sieve . Therefore the protocol is not up. I've modified this line and it
worked. Thanks for you help.

Post by He Shiming
Thanks Andy. But I do have this line 'protocols = lmtp imap pop3' in
dovecot.conf. This line doesn't contain 'sieve' either. Is it possible for
other config file to override this line?

Post by Andy R
Hi there,
Have you added 'lmtp' to the protocols line in dovecot.conf ? It's not
listed in your doveconf -n.
IE :-
# Protocols we want to be serving.
#protocols = imap pop3 sieve
protocols = imap pop3 sieve lmtp
For logging, set "mail_debug = yes" (in /etc/dovecot/conf.d/10-**logging.conf
on my system).

Post by He Shiming
Dear Community,
I've got a weird problem regarding lmtp setup with dovecot 2.0.19 on ubuntu
12.04.2 LTS. My reference of the configuration is at
https://library.linode.com/**email/postfix/postfix2.9.6-**
dovecot2.0.19-mysql<https://library.linode.com/email/postfix/postfix2.9.6-dovecot2.0.19-mysql>,
and my configuration is identical to it with the exception of opening the
110 pop3 port, and enabling plain text auth. Everything from imap, smtp,
pop3 (including auth) works except for lmtp.
May 31 09:05:24 postfix/lmtp[3664]: 2FD80321F4: to=<myaddress at me.com>,
relay=none, delay=0.41, delays=0.41/0/0/0, dsn=4.4.1, status=deferred
(connect to me.com[private/dovecot-lmtp]: No such file or directory)
And it happens when an incoming email is received.
root at prosp:/etc/dovecot/conf.**d# dovecot -n
# 2.0.19: /etc/dovecot/dovecot.conf
# OS: Linux 3.8.4-linode50 i686 Ubuntu 12.04.2 LTS ext3
auth_mechanisms = plain login
disable_plaintext_auth = no
mail_location = maildir:/var/mail/vhosts/%d/%n
mail_privileged_group = mail
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
passdb {
args = /etc/dovecot/dovecot-sql.conf.**ext
driver = sql
}
plugin {
sieve = ~/.dovecot.sieve
sieve_dir = ~/sieve
}
protocols = imap pop3 sieve
service auth-worker {
user = vmail
}
service auth {
unix_listener /var/spool/postfix/private/**auth {
group = postfix
mode = 0666
user = postfix
}
unix_listener /var/spool/postfix/private/**dovecot-auth {
group = postfix
mode = 0660
user = postfix
}
unix_listener auth-userdb {
mode = 0600
user = vmail
}
user = dovecot
}
service imap-login {
inet_listener imap {
port = 0
}
}
service lmtp {
unix_listener /var/spool/postfix/private/**dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
}
service pop3-login {
inet_listener pop3 {
port = 110
}
}
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 {
args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n
driver = static
}
protocol imap {
imap_client_workarounds = delay-newmail
mail_max_userip_connections = 10
}
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
}
http://serverfault.com/**questions/512219/dovecot-lmtp-**does-not-exist<http://serverfault.com/questions/512219/dovecot-lmtp-does-not-exist>. I've
then tried switching from unix socket to inet listener, and still got the
same result. I cannot get lmtp service to start.
I'm also seeing no errors in the log when dovecot is restarted (see the
above link for the log).
I'm wondering how do I go about troubleshooting this problem? What might be
the possible cause? Is it possible for dovecot to output verbose logs
regarding service startups?
Thank you.

--
Best regards,
He Shiming
*Kaoya.me <http://kaoya.me> | Goals.io<http://itunes.apple.com/us/app/goals.io-realize-your-dreams/id496228828?ls=1&mt=8>
| Toppin'Wiper <https://itunes.apple.com/app/toppinwiper/id553527232?mt=8>
| MediaMan <http://www.imediaman.com>*