continued from "smtp time outs and delays + spamc being called when using amavis-new" mouss wrote: "hard to tell, but a first bet is reverse DNS lookup. if the clients use a private IP space, make sure your DNS server answers for thecorresponding reverse zone so that postfix gets an NXDOMAIN quickly, instead of waiting for dns queries to travel around the world..." I am using postfix 2.5.4 with amavisd-new, courier imap, clamd, spamassasin, maildrop on Ubuntu 6.06.2 LTS server which I inherited. I have been struggling alone to try to resolve two issues and hope that i can get some help here. Issue 1. Many of my users have been encountering smtp time outs and delays (most are using thunderbird latest version) . Most of the time smtp is very responsive but at times there are these delays of 10-30 seconds and sometimes the connection times out. delays occur on both port 25 and 587. I have noted that smtp processes are not at maximum during these times, also there is more than enough memory on the server. default_process_limit = 100
I have read over http://postfix.mirrorspace.org/STRESS_README.html and checked my main.cf and master.cf to see if I could change some settings but all seams to check out. Here is my main.cf # Postfix master process configuration file. For details on the format# of the file, see the Postfix master(5) manual page.## ==========================================================================# service type private unpriv chroot wakeup maxproc command + args# (yes) (yes) (yes) (never) (100)# ==========================================================================smtp inet n - - - - smtpd#submission inet n - - - - smtpd# -o smtpd_etrn_restrictions=reject# -o smtpd_client_restrictions=permit_sasl_authenticated,rejectsmtps inet n - n - - smtpd -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes#submission inet n - - - - smtpd# -o smtpd_etrn_restrictions=reject# -o smtpd_enforce_tls=yes -o smtpd_sasl_auth_enable=yes#628 inet n - - - - qmqpd587 inet n - - - - smtpd -o smtpd_sasl_auth_enable=yespickup fifo n - - 60 1 pickup -o content_filter= -o receive_override_options=no_header_body_checkscleanup unix n - - - 0 cleanupqmgr fifo n - - 300 1 qmgr#qmgr fifo n - - 300 1 oqmgr#tlsmgr unix - - - 1000? 1 tlsmgrtlsmgr unix - - n 300 1 tlsmgrrewrite unix - - - - - trivial-rewritebounce unix - - - - 0 bouncedefer unix - - - - 0 bouncetrace unix - - - - 0 bounceverify unix - - - - 1 verifyflush unix n - - 1000? 0 flushproxymap unix - - n - - proxymapsmtp unix - - - - - smtp# When relaying mail as backup MX, disable fallback_relay to avoid MX loopsrelay unix - - - - - smtp -o fallback_relay=# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5showq unix n - - - - showqerror unix - - - - - errordiscard unix - - - - - discardlocal unix - n n - - localvirtual unix - n n - - virtuallmtp unix - - - - - lmtpanvil unix - - - - 1 anvilscache unix - - - - 1 scache## ====================================================================# Interfaces to non-Postfix software. Be sure to examine the manual# pages of the non-Postfix software to find out what options it wants.## Many of the following services use the Postfix pipe(8) delivery# agent. See the pipe(8) man page for information about ${recipient}# and other message envelope options.# ====================================================================## maildrop. See the Postfix MAILDROP_README file for details.# Also specify in main.cf: maildrop_destination_recipient_limit=1#maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}## See the Postfix UUCP_README file for configuration details.#uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)## Other external delivery methods.#ifmail unix - n n - - pipe flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)bsmtp unix - n n - - pipe flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipientscalemail-backend unix - n n - 2 pipe flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}mailman unix - n n - - pipe flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user} # added 2006-04-20 by topher#smtp-amavis unix - - n - 2 smtpsmtp-amavis unix - - - - 2 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes -o disable_dns_lookups=yes -o max_use=20 127.0.0.1:10025 inet n - - - - smtpd -o content_filter= -o local_recipient_maps= -o relay_recipient_maps= -o smtpd_restriction_classes= -o smtpd_delay_reject=no -o smtpd_client_restrictions=permit_mynetworks,reject -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o smtpd_data_restrictions=reject_unauth_pipelining -o smtpd_end_of_data_restrictions= -o mynetworks=127.0.0.0/8 -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 -o smtpd_client_connection_count_limit=0 -o smtpd_client_connection_rate_limit=0 -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks -o smtpd_bind_address=127.0.0.1retry unix - - - - - error Please let me know what I can do to trouble shoot this further or if I need to post any more conf files here. _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
