Problem with first login

[Preliator]

Hi everyone. I am italian and I don't speak english very well.
I have installed Roundcube 1.0.1 on a VPS with CentOS 6 in the root /usr/share/roundcube/ (hope is correct) and now I can access to rc at https://www.mydomain.it/roundcube but I am unable to login. During installation the process ask me a username and password but in the first login I can't go ahead because the username or password are incorrect. But I am sure to put the correct user and pass. What can I have to do to resolve this problem? can be a SSL's problem? the main domain is on the http without ssl but the rc is accessible only on https.

Thanks

[SKaero]

Are you logging in with your mail account username and password?

[Preliator]

This is the problem, I have nothing: no user, no pass, no email account. Nothing. I just installed rc

[SKaero]

Roundcube is just a webmail client, you'll need to setup a mail server like Dovecot and a SMTP server like Postfix in order to setup mail accounts.

[Preliator]

Package 1:dovecot-2.0.9-7.el6_5.1.x86_64 already installed and latest version
Nothing to do

Package matching 2:postfix-2.6.6-6.el6_5.x86_64 already installed. Checking for update.
Nothing to do

What now?

[SKaero]

You need to setup them up and configure how you want user authentication to work, maybe look into PostFixAdmin.

[Preliator]

Ok i setup PostFixAdmin. I added the maindomain.tld and his aliasdomain.tld (because is shorter). Then I created the e-mail [email protected] but nothing again... I am unable to login into mydomain.tld/roundcube this time, however, I don't get 'wrong username or password', it just keep to load and after some second it stop staying at login page.

[SKaero]

Any errors in the Roundcube error log?

[Preliator]

Yes:

Code Select Expand

[14-Jul-2014 00:03:43 +0200]: IMAP Error: Login failed for [email protected] from 87.0.38.10(X-Real-IP: 87.0.38.10,X-Forwarded-For: 87.0.38.10). Temporary authentication failure. in /usr/share/roundcube/program/lib/Roundcube/rcube_imap.php on line 184 (POST /roundcube/?_task=login?_task=login&_action=login)You can see the domain. This error is the same for all attempts...
I've tried this fix (the first answer) but nothing... still error

[SKaero]

That error means Postfix isn't setup correctly, check the postfix logs.

[Preliator]

A very long page (1265 pages ) but the relative error at login is:

Code Select Expand

Jul 14 10:20:16 vps79454 postfix/smtpd[20334]: connect from unknown[unknown]
Jul 14 10:20:16 vps79454 /usr/lib64/plesk-9.0/psa-pc-remote[1056]: Unable to interpret remote host address
Jul 14 10:20:16 vps79454 postfix/smtpd[20334]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
Jul 14 10:20:16 vps79454 postfix/smtpd[20334]: lost connection after CONNECT from unknown[unknown]
Jul 14 10:20:16 vps79454 postfix/smtpd[20334]: disconnect from unknown[unknown]
Jul 14 10:20:24 vps79454 postfix/smtpd[20272]: connect from unknown[191.233.70.80]
Jul 14 10:21:06 vps79454 postfix/smtpd[20272]: warning: SASL authentication failure: incorrect digest response
Jul 14 10:21:06 vps79454 postfix/smtpd[20272]: warning: unknown[191.233.70.80]: SASL CRAM-MD5 authentication failed: authentication failure

Thanks for your patience!