Hi all,
Hope someone can help. I can't get roundcube working.
System info:
CentOS 6
Postfix/Dovecot/sendmail - all looks fine to me
nmap/netstat shows ports open and listening

I can telnet to localhost 25 / localhost 110 / localhost 143. For 110 I get connection closed by foreign host error after typing in PASS command. I assume this to be an rcmail error but can see no way out.

Moreover everytime I try to login to webmail.domain.com, it still gives me an error message that "Connection to IMAP failed". I'm really desperate already.

Please help,
Thanks!

try to enable debug logging for dovecot and see what error you get in the mail logs

please do come back with the results

java socket

Now it's not even sending out emails. I would say some config messes up with both the smtp and pop3/imap services

This is output of my MailLog:
Sep 3 12:07:17 myhostname postfix/error[21924]: DFCFB1C1D3D: to=<mymail@mydomain.com>, relay=none, delay=45004, delays=45004/0.05/0/0, dsn=4.3.5, status=deferred (delivery temporarily suspended: mail for mydomain.com loops back to myself)
Sep 3 12:07:17 myhostname postfix/error[21924]: DFCFB1C1D3D: to=<predmet@localhost6.localdomain6>, relay=none, delay=45004, delays=45004/0.05/0/0, dsn=4.3.5, status=deferred (delivery temporarily suspended: mail for mydomain.com loops back to myself)
Sep 3 12:07:17 myhostname postfix/error[21923]: 8E6471C1D36: to=<mymail@mydomain.com>, relay=none, delay=47835, delays=47835/0.05/0/0, dsn=4.3.5, status=deferred (delivery temporarily suspended: mail for mydomain.com loops back to myself)
Sep 3 12:07:17 myhostname postfix/error[21924]: 8CFA31C1E50: to=<mymail@mydomain.com>, relay=none, delay=42089, delays=42089/0.05/0/0, dsn=4.3.5, status=deferred (delivery temporarily suspended: mail for mydomain.com loops back to myself)
Sep 3 12:07:17 myhostname postfix/error[21923]: 806BE1C1E4E: to=<mymail@mydomain.com>, relay=none, delay=5178, delays=5178/0.05/0/0, dsn=4.3.5, status=deferred (delivery temporarily suspended: mail for mydomain.com loops back to myself)

I may know what to suspect, but don't know how to fix it. DIG MX output looks okay as well. It finds my MX record easily. Reverse DNS when pinging the domain works as well.

This is filtered out config for Postfix/main.cf. Something must be wrong, but what?

mydomain = mydomain.com
myorigin = $myhostname
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, localhost, mail.mydomain.com
#relay_domains = $mydestination
relayhost = $mydomain
mtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination
broken_sasl_auth_clients = yes

Thanks,