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Hi Stephen ,
I am handling via TCP i.e from smtp server to mailbox server.
on smtp server postfix's main.cf transport_maps is maintain ,
which deliver the emails to lmtp.
Example like below.
/@mydomain.com/ lmtp:[192.168.1.1]
Request you to please guide here or any fine tuning etc ....
Regards
Jayesh Shinde
On 05/15/2015 10:11 PM, Stephen Ulmer wrote:
Are you handing off to LMTP via TCP or a pipe?
Thanks Dan for your
feedback.
I verified the suggested points , its working as
require. Please find below inline reply for each.
I found that when big group email is getting
deliver ( i.e more than 500 - 4K members ) at that
time other emails are not getting deliver
simultaneously to user's mailbox.
I verified this from live maillog i.e by doing
grep key words like "to mailbox:" / "Delivered:"
etc ...
My mail queue issue is getting critical in peak
hours !! Kindly suggest.
On 05/14/2015 08:22 PM, Dan White wrote:
On 05/14/15 05:42 +0000,
jayesh.shinde wrote:
Please
suggest , for faster delivery what could be the
best config in
postfix + cyrus-imapd .
I am using the cyrus-imapd-2.4.17-6.el6.x86_64 for
mailbox server and for
smtp server postfix-2.10.0-1.el6.x86_64 Both
server have SAS hdd , 16 core
, 16 GB RAM . There is no i/o issues
Mailbox
server have 21K email ids. Cyrus running with
tcp socket on
port 24 i.e lmtpd . cyrus singleinstance is
maintained
For group id
mapping is under virtual_alias_maps of smtp's
main.cf i.e no
/etc/aliases. From smtp server emails are getting
deliver by
transport_maps to mailbox server .
My problem
observe :--
--------------------------
1) When HOD send email to 3-5 big group email ids
then , then its postfix
delivery get slow. What I observe is postfix
getting delivered the traffic
per email and not parallel. Each group contain
3k or 7k email ids.
Verify that single instance store is working. If
not, you may have a
Postfix configuration issue. Find one of these mass
emails in a mailbox and
stat it to find out:
stat -c %h <file>
A returned value of 1 means single instance store
isn't working.
If that's not the issue, you can determine if this
is a postfix issue or a
cyrus issue by sending a mass email directly to
lmtpd, with lmtptest.
Cyrus
Singleinstance is working , I have verified like
below. In imapd.conf man page its define as default 1
( i.e default enable )
[root@Mailbox ~]# ls -lirth
/var/spool/imap/domain/v/vdomain/m/user/muser1/ | tail
-n 20
163326970 -rw------- 198 cyrus mail
413K May 15 10:07 64828.
163396232 -rw------- 145 cyrus mail
92K May 15 10:13 64829.
163379367 -rw------- 151 cyrus mail
96K May 15 10:29 64830.
163323993 -rw------- 496 cyrus mail
13K May 15 10:30 64831.
163398621 -rw------- 516 cyrus mail
850K May 15 10:42 64832.
163398568 -rw------- 523 cyrus mail
455K May 15 10:43 64833.
163398933 -rw------- 617 cyrus mail
3.7M May 15 10:47 64834.
163398962 -rw------- 522 cyrus mail
1.3M May 15 10:48 64835.
163398990 -rw------- 617 cyrus mail
58K May 15 10:49 64836.
163396678 -rw------- 465 cyrus mail
207K May 15 10:56 64837.
163399529 -rw------- 576 cyrus mail
332K May 15 10:57 64838.
163399554 -rw------- 2 cyrus mail
54K May 15 10:57 64839.
163346523 -rw------- 36 cyrus mail
767K May 15 11:01 64840.
[root@Mailbox muser1]# stat -c %h 64829.
145
[root@Mailbox muser1]# stat -c %h
64828.
198
In peak hours
the queue on postfix get high and other normal
emails also
getting stuck in queue. Once the group email get
clear after that other
emails also get clear.
in mailbox
cyrus.conf :-- lmtp cmd="lmtpd -a" listen="lmtp"
prefork=0
in main.cf of smtp server :--
lmtp_destination_concurrency_limit = 100
lmtp_destination_recipient_limit = 0
How many lmtp processes do you see spawned in this
scenario?
[root@Mailbox
~]# ps auxwww| grep lmtp
cyrus 3224 0.0 0.0 73376 4648 ? S
10:55 0:00 lmtpd
cyrus 4043 0.0 0.0 73376 4156 ? S
10:59 0:00 lmtpd
postfix 6972 0.0 0.0 75708 4336 ? S
11:10 0:00 lmtp -t unix -u
postfix 6974 0.0 0.0 75708 4340 ? S
11:10 0:00 lmtp -t unix -u
postfix 6975 0.0 0.0 75708 4336 ? S
11:10 0:00 lmtp -t unix -u
postfix 6977 0.0 0.0 75708 4344 ? S
11:10 0:00 lmtp -t unix -u
postfix 6979 0.0 0.0 75708 4336 ? S
11:10 0:00 lmtp -t unix -u
postfix 6981 0.0 0.0 75708 4336 ? S
11:10 0:00 lmtp -t unix -u
postfix 6985 0.0 0.0 75708 4348 ? S
11:10 0:00 lmtp -t unix -u
cyrus 6998 0.0 0.0 73376 4052 ? S
11:10 0:00 lmtpd
cyrus 7001 0.0 0.0 73376 4044 ? S
11:10 0:00 lmtpd
cyrus 7234 0.9 0.0 75456 4976 ? S
11:12 0:04 lmtpd -a
cyrus 8758 0.6 0.0 75452 4112 ? S
11:19 0:00 lmtpd -a
root 8898 0.0 0.0 103236 972 pts/1 S+
11:19 0:00 grep --colour=auto lmtp
cyrus 46046 0.0 0.0 73376 4648 ? S
10:28 0:01 lmtpd
cyrus 48107 0.0 0.0 73372 4740 ? S
10:37 0:01 lmtpd
cyrus 48108 0.0 0.0 73376 4700 ? S
10:37 0:01 lmtpd
lmtpd :-- 7 process
lmtp -t unix -u :-- 7 process
lmtpd -a :-- 2 process
Cyrus config is as follows:
-----------------------------------
SERVICES {
imap cmd="imapd" listen="imap" prefork=5
imaps cmd="imapd -s" listen="imaps" prefork=1
pop3 cmd="pop3d" listen="pop3" prefork=3
pop3s cmd="pop3d -s" listen="pop3s" prefork=1
sieve cmd="timsieved" listen="sieve"
prefork=0
lmtp cmd="lmtpd -a" listen="lmtp" prefork=0
lmtpunix cmd="lmtpd"
listen="/var/lib/imap/socket/lmtp" prefork=1
}
[root@Mailbox ~]# cat /etc/imapd.conf
configdirectory: /var/lib/imap
partition-default: /var/spool/imap
admins: cyrus
sievedir: /var/lib/imap/sieve
sendmail: /usr/sbin/sendmail
hashimapspool: true
sasl_pwcheck_method: saslauthd
sasl_mech_list: PLAIN
allowplaintext: yes
unixhierarchysep: 1
virtdomains: yes
altnamespace: on
defaultdomain: mydomain.com
expunge_mode: immediate
delete_mode: immediate
tls_cert_file: /usr/share/ssl/certs/server.pem
tls_key_file: /usr/share/ssl/certs/server.key
tls_ca_file: /etc/pki/tls/certs/ca-bundle.crt
lmtp_over_quota_perm_failure: 1
duplicatesuppression: 1
duplicate_db_path:
/var/lib/imap/cyrus-ram-tmpfs/deliver.db
statuscache_db_path:
/var/lib/imap/cyrus-ram-tmpfs/statuscache.db
tlscache_db_path:
/var/lib/imap/cyrus-ram-tmpfs/tls_sessions.db
Regards
Jayesh Shinde
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