The most important thing when sorting out delay is to check logs for delay. It will give the processing time each Postfix component spent on email. Also check the full header of delayed mail.
Read this two manuals. Postfix Performance tunning guide http://www.postfix.org/TUNING_README.html Postfix Bottleneck analysis http://www.postfix.org/QSHAPE_README.html Can you provide the current load and memory usage with current configuration. Because I see a lot of bottleneck with this configuration. On Sat, Nov 23, 2013 at 6:09 PM, Kranti Kiran Patnaik < krantikiranpatn...@gmail.com> wrote: > Hi, > > Can someone share a very good postfix 2.10 installation guide for managing > 2-5million emails per day? My current postfix is unable to handle such > large volume as lot of emails are getting stuck in the incoming folder and > thus the deliveries are delayed upto 2-3 days. My current postfix > configuration is on the following platform > > OS: RHELRed Hat Enterprise Linux Server release 5.4 (Tikanga) 32bit > RAM: 4GB > Postfix: postfix-2.3.3-2.1.el5_2, postfix-pflogsumm-2.3.3-2.1.el5_2 (rpms > installed which come through RHEL5.4) > > Dovecot: dovecot-1.0.7-7.el5 > > output of postconf -n > -------------------------------------------------------- > alias_database = hash:/etc/aliases > alias_maps = hash:/etc/aliases > bounce_queue_lifetime = 0 > broken_sasl_auth_clients = yes > command_directory = /usr/sbin > config_directory = /etc/postfix > daemon_directory = /usr/libexec/postfix > debug_peer_level = 2 > default_destination_concurrency_limit = 5 > default_destination_recipient_limit = 5 > html_directory = no > inet_interfaces = all > initial_destination_concurrency = 2 > local_recipient_maps = > mail_owner = postfix > mailq_path = /usr/bin/mailq.postfix > manpage_directory = /usr/share/man > maximal_queue_lifetime = 0 > message_size_limit = 19240000 > mydestination = $myhostname, localhost.$mydomain, localhost > mydomain = smtp1.conrepmail.com > myhostname = smtp1.xxxxxxdomainmail.com > newaliases_path = /usr/bin/newaliases.postfix > non_smtpd_milters = unix:/var/run/dkim-milter/dkim-milter.sock, > unix:/var/run/dk-milter/dk-milter.sock > notify_classes = bounce, delay, resource > queue_directory = /var/spool/postfix > queue_run_delay = 2m > readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES > sample_directory = /usr/share/doc/postfix-2.3.3/samples > sendmail_path = /usr/sbin/sendmail.postfix > setgid_group = postdrop > smtpd_banner = smtp1.xxxxxxdomainmail.com > smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated, > reject_unauth_destination, reject_unknown_sender_domain > smtpd_delay_reject = no > smtpd_error_sleep_time = 1s > smtpd_hard_error_limit = 20 > smtpd_milters = unix:/var/run/dkim-milter/dkim-milter.sock, > unix:/var/run/dk-milter/dk-milter.sock > smtpd_recipient_restrictions = permit_mynetworks, > permit_sasl_authenticated, reject_unauth_destination > smtpd_reject_unlisted_sender = yes > smtpd_sasl_auth_enable = yes > smtpd_sasl_path = private/auth > smtpd_sasl_security_options = noanonymous > smtpd_sasl_type = dovecot > smtpd_soft_error_limit = 10 > transport_maps = hash:/etc/postfix/transport > unknown_local_recipient_reject_code = 550 > virtual_alias_maps = hash:/etc/postfix/virtual > ------------------------------------------------------- > > cat /etc/transport > yahoo.com slow:yahoo.com > yahoo.co.in slow:yahoo.co.in > yahoo.co.uk slow:yahoo.co.uk > yahoo.us slow:yahoo.us > yahoo.ca slow:yahoo.ca > yahoo.fr slow:yahoo.fr > yahoogroups.com slow:yahoogroups.com > yahoo.co.nz slow:yahoo.co.nz > yahoo-inc.com slow:yahoo-inc.com > yahoo.de slow:yahoo.de > yahoo.co.kr slow:yahoo.co.kr > yahoo.es slow:yahoo.es > gmail.com gmail:gmail.com > msn.com hotmail:msn.com > hotmail.com hotmail:hotmail.com > cox.net cox:cox.net > -------------------------------- > > cat /etc/postfix/virtual > > #smtp1.xxxxxxdomainmail.com > smtp1.xxxxxxdomainmail.com virtual > postmas...@smtp1.xxxxxxdomainmail.com smtp1.xxxxxxdomainmail.com > #Abuse > ab...@smtp1.xxxxxxdomainmail.com abuse > sm...@smtp1.xxxxxxdomainmail.com smtp1 > ---------------------------------- > I am using dkim-milter also. > > The same kind of configuration is there for my other smtp server and it > processes fine, but in case of this server it is not able to handle bulk > mails. How to resolve this issue. > -- > Thanks & Regards, > Kranti Kiran Patnaik > > Please do not print this email unless it is absolutely necessary. > > The information contained in this electronic message and any attachments > to this message are intended for the exclusive use of the addressee(s) and > may contain proprietary, confidential or privileged information. If you are > not the intended recipient, you should not disseminate, distribute or copy > this e-mail. Please notify the sender immediately and destroy all copies of > this message and any attachments. > WARNING: Computer viruses can be transmitted via email. The recipient > should check this email and any attachments for the presence of viruses. > The company accepts no liability for any damage caused by any virus > transmitted by this email. >
