Hi everyone, I've got a problem with POP3 access on my server. The access to the mails is rather slow. I am using Outlook XP on Windows for retrieving the mails, and it seems to "pause" slightly after each email. All emails are downloaded fine, and there are no timeouts, however it takes up a lot of time. I have tried both Dovecot and Courier on the server. This is an issue with TLS or without TLS. I am authenticating against plain UNIX users (basically changed nothing in the configuration scripts, except the TLS cert). This is on a relatively unchanged Suse 9.3 system. No error or warning messages in the log. I am really at a loss here - what could possibly cause this problem? The server should be a lot faster than this (3 GHz, plenty of RAM, fast Internet connection). My previous server was less capable and worked fine, also with Outlook, same setup (also with courier, but on Debian). I just can't seem to find the relevant difference... Any ideas? Thanks a lot!
Sounds like a firewall problem. What's the output of Code: iptables -L ? Might also be a problem with your desktop firewall, if you use one.
Thanks for your answer! iptables is set to accept anything: --- Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination --- I also do not have a desktop firewall. I tried using Thunderbird for a change, with the same result. I have also verified that the CLIENT seems to pause after each email, i.e. before sending the next "RCPT x" command to the POP server. (some 0.3 seconds to 1 second delay). I still have NO idea what's causing this...
No related errors in any of the mail log files (in fact, no errors at all for pop3). /var/log/mail logs a typical session like this: Sep 7 11:20:20 servername pop3d: Connection, ip=[::ffff:xx.xx.xx.xx] Sep 7 11:20:20 servername pop3d: LOGIN, user=makedo, ip=[::ffff:xx.xx.xx.xx] Sep 7 11:20:24 servername pop3d: LOGOUT, user=makedo, ip=[::ffff:xx.xx.xx.xx], top=0, retr=10128, time=4 Hm... any other ideas?
Didn't you say you are using Courier? Your logs show another POP3 daemon. What's the output of Code: netstat -tap ?
Netstat coming up...: Code: Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:pop3 *:* LISTEN 12369/couriertcpd The courier package is from Suse 9.3. Started with /etc/init.d/courier-pop3.
Ok, it's Courier then. What's the output of Code: ps aux ? What's the output of Code: updatedb locate courier ?
ps aux: Code: USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 26128 0.0 0.0 1380 464 ? S Sep05 0:00 /usr/sbin/courierlogger -pid=/var/run/authdaemon.courier-imap/pid -start /usr/lib/courier-imap/authlib/authdaemond.plain root 26129 0.0 0.0 1728 508 ? S Sep05 0:00 /usr/lib/courier-imap/authlib/authdaemond.plain root 26130 0.0 0.0 1924 728 ? S Sep05 0:00 /usr/lib/courier-imap/authlib/authdaemond.plain root 26131 0.0 0.0 1924 728 ? S Sep05 0:00 /usr/lib/courier-imap/authlib/authdaemond.plain root 26141 0.0 0.0 1924 728 ? S Sep05 0:00 /usr/lib/courier-imap/authlib/authdaemond.plain root 26142 0.0 0.0 1924 728 ? S Sep05 0:00 /usr/lib/courier-imap/authlib/authdaemond.plain root 26177 0.0 0.0 1924 728 ? S Sep05 0:00 /usr/lib/courier-imap/authlib/authdaemond.plain root 23718 0.0 0.0 1480 520 ? S 14:57 0:00 /usr/lib/courier-imap/couriertcpd -address=0 -stderrlogger=/usr/sbin/courierlogger -stderrloggername=pop3d -maxprocs=40 -maxperip=4 -pid=/var/run/pop3d.pid -nodnslookup -noidentlookup 110 /usr/sbin/pop3login /usr/lib/courier-imap/authlib/authdaemon /usr/sbin/pop3d Maildir root 23720 0.0 0.0 1252 296 ? S 14:57 0:00 /usr/sbin/courierlogger pop3d locate courier Code: /etc/courier /etc/courier/authdaemonrc /etc/courier/authdaemonrc.dist /etc/courier/imapd /etc/courier/imapd-ssl /etc/courier/imapd-ssl.dist /etc/courier/imapd.cnf /etc/courier/imapd.dist /etc/courier/pop3d /etc/courier/pop3d-ssl /etc/courier/pop3d-ssl.dist /etc/courier/pop3d.cnf /etc/courier/pop3d.dist /etc/courier/quotawarnmsg.example /etc/init.d/courier-authdaemon /etc/init.d/courier-imap /etc/init.d/courier-imap-ssl /etc/init.d/courier-pop3 /etc/init.d/courier-pop3-ssl /etc/init.d/rc3.d/K09courier-pop3-ssl /etc/init.d/rc3.d/K10courier-authdaemon /etc/init.d/rc3.d/S12courier-authdaemon /etc/init.d/rc3.d/S13courier-pop3-ssl /etc/init.d/rc5.d/K09courier-pop3-ssl /etc/init.d/rc5.d/K10courier-authdaemon /etc/init.d/rc5.d/S12courier-authdaemon /etc/init.d/rc5.d/S13courier-pop3-ssl /usr/lib/courier-imap /usr/lib/courier-imap/authlib /usr/lib/courier-imap/authlib/authdaemon /usr/lib/courier-imap/authlib/authdaemond /usr/lib/courier-imap/authlib/authdaemond.plain /usr/lib/courier-imap/couriertcpd /usr/lib/courier-imap/makedatprog /usr/sbin/courierlogger /usr/sbin/couriertls /usr/sbin/rccourier-authdaemon /usr/sbin/rccourier-imap /usr/sbin/rccourier-imap-ssl /usr/sbin/rccourier-pop3 /usr/sbin/rccourier-pop3-ssl /usr/share/courier-imap /usr/share/courier-imap/configlist /usr/share/courier-imap/configlist.ldap /usr/share/courier-imap/makeuserdb /usr/share/courier-imap/mkimapdcert /usr/share/courier-imap/mkpop3dcert /usr/share/courier-imap/pop3d.pem /usr/share/courier-imap/pw2userdb /usr/share/courier-imap/sysconftool /usr/share/courier-imap/userdb /usr/share/courier-imap/vchkpw2userdb /usr/share/doc/packages/courier-imap /usr/share/doc/packages/courier-imap/AUTHORS /usr/share/doc/packages/courier-imap/BUGS /usr/share/doc/packages/courier-imap/COPYING /usr/share/doc/packages/courier-imap/README /usr/share/doc/packages/courier-imap/README.authdebug.html /usr/share/doc/packages/courier-imap/README.authdebug.html.in /usr/share/doc/packages/courier-imap/README.authmysql.html /usr/share/doc/packages/courier-imap/README.authmysql.myownquery /usr/share/doc/packages/courier-imap/README.authpostgres.html /usr/share/doc/packages/courier-imap/README.imap /usr/share/doc/packages/courier-imap/README.ldap /usr/share/doc/packages/courier-imap/README.maildirquota /usr/share/doc/packages/courier-imap/README.sharedfolders /usr/share/man/man1/courierlogger.1.gz /usr/share/man/man1/couriertcpd.1.gz /usr/share/man/man8/courier-imapd.8.gz /usr/share/munin/plugins/courier_ /usr/share/munin/plugins/courier_mta_mailqueue /usr/share/munin/plugins/courier_mta_mailstats /usr/share/munin/plugins/courier_mta_mailvolume /var/adm/YaST/InstSrcManager/IS_CACHE_0x00000001/MEDIA/suse/i586/courier-imap-3.0.8-3.i586.rpm /var/run/authdaemon.courier-imap /var/run/authdaemon.courier-imap/pid /var/run/authdaemon.courier-imap/pid.lock /var/run/authdaemon.courier-imap/socket /var/run/couriersslcache
