Hello, I'm running a Debian server (postfix, courier-imap, courier-pop) with several domains and email addresses. If I use POP3 everything's just fine but whenever I try to use IMAP I get following error: Task 'Synchronizing subscribed folders for [email address].' reported error (0x800CCC0E) : 'Outlook cannot synchronize subscribed folders for [email address]. Error: Cannot connect to the server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).' But the problem is that it works at times but 3/4 times it doesn't. Does anyone know what the problem could be? Thank you
Couldn't find any suspicious entries in my mail log. netstat seems pretty ok as well: Code: Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 server8.local:8000 *:* LISTEN 11775/ruby tcp 0 0 server8.local:8001 *:* LISTEN 11778/ruby tcp 0 0 *:32769 *:* LISTEN 1203/rpc.statd tcp 0 0 server8.local:8200 *:* LISTEN 12024/ruby tcp 0 0 server8.local:10024 *:* LISTEN 828/amavisd (master tcp 0 0 server8.local:8201 *:* LISTEN 12027/ruby tcp 0 0 server8.local:mysql *:* LISTEN 1034/mysqld tcp 0 0 *:pop3 *:* LISTEN 2052/couriertcpd tcp 0 0 *:imap2 *:* LISTEN 2045/couriertcpd tcp 0 0 server8.local:spamd *:* LISTEN 839/spamd.pid tcp 0 0 *:sunrpc *:* LISTEN 583/portmap tcp 0 0 *:www *:* LISTEN 11048/apache2 tcp 0 0 *:auth *:* LISTEN 1096/inetd tcp 0 0 server8.local:9876 *:* LISTEN 1315/vhcs2_daemon tcp 0 0 server8:domain *:* LISTEN 15699/named tcp 0 0 server8.local:domain *:* LISTEN 15699/named tcp 0 0 *:ftp *:* LISTEN 1235/proftpd: (acce tcp 0 0 *:ssh *:* LISTEN 1189/sshd tcp 0 0 *:smtp *:* LISTEN 15767/master tcp 0 0 server8.local:953 *:* LISTEN 15699/named tcp 0 0 *:https *:* LISTEN 11048/apache2
Is there maybe a firewall blocking access to port 143 (IMAP)? What's the output of Code: iptables -L ?
Wouldn't it be not working at all if it was blocked? Well, it's not: Code: Chain INPUT (policy ACCEPT) target prot opt source destination tcp -- anywhere anywhere tcp dpt:smtp tcp -- anywhere anywhere tcp dpt:imap2 tcp -- anywhere anywhere tcp dpt:pop3 tcp -- anywhere anywhere tcp dpt:www 0 -- anywhere anywhere Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination tcp -- anywhere anywhere tcp spt:smtp tcp -- anywhere anywhere tcp spt:imap2 tcp -- anywhere anywhere tcp spt:pop3 tcp -- anywhere anywhere tcp spt:www 0 -- anywhere anywhere
Yes: Code: Jun 28 06:39:22 myserver couriertcpd: LOGIN: ip=[::ffff:XX.XX.XX.XX], command=LOGIN Jun 28 06:39:22 myserver couriertcpd: LOGIN: ip=[::ffff:XX.XX.XX.XX], [email protected] Jun 28 06:39:22 myserver couriertcpd: LOGIN, [email protected], ip=[::ffff:XX.XX.XX.XX], protocol=IMAP
Did you resolve this? Hello, Did you resolve this after as I am having exactly the same problem? Cheers, Jamie
Yes, I had to increase -maxperip parameter for the couriertcpd: root 2617 0.0 0.2 1940 524 ? S Feb16 0:32 /usr/sbin/couriertcpd -address=0 -maxprocs=40 -maxperip=20 -nodnslookup -noidentlookup 143 /usr/lib/courier/courier/imaplogin /usr/bin/imapd Maildi... That did the trick.
I use Dovecot for IMAP but does your IMAP server have a config file you can post? That may point to some clues.
