when I send message .system show error message

[pxjianke]

when I send message .system show error message:
Trying to send email...
SMTP send:  NOT OK(Connection failed: Failed to connect socket: No connection could be made because the target machine actively refused it.
)
But when I test in outlook it's ok.I don't know how to deal with this.
my email server :hmailserver 5.3.3
webmail :roundcube 0.4.2
please help me.waiting for your replay.
thanks.

log:
[31-Dec-2010 11:26:55] No connection could be made because the target machine actively refused it.

 (10061):

[31-Dec-2010 11:26:55] Failed to connect socket: No connection could be made because the target machine actively refused it.

 ():

[31-Dec-2010 11:26:55 +0800]: SMTP Error: SMTP error: Connection failed: Failed to connect socket: No connection could be made because the target machine actively refused it.
 in E:\php\eclipse\workspace\puhuatech\mail\program\steps\mail\func.inc on line 1491 (POST /mail/?_task=mail&_action=send)

[SKaero]

Your mail server is blocking the connection to RoundCube, its most likely a firewall problem.

[pxjianke]

thank for skaero .
   
I have closed firewall.
I can login and I don't send out mail
my config file:

$rcmail_config['default_host'] = 'mail.puhuatech.com';
$rcmail_config['default_port'] = 143;
$rcmail_config['imap_auth_type'] = null;
$rcmail_config['imap_root'] = null;
$rcmail_config['imap_delimiter'] = null;
$rcmail_config['imap_force_caps'] = false;
$rcmail_config['imap_timeout'] = 0;

$rcmail_config['smtp_server'] = 'mail.puhuatech.com';
$rcmail_config['smtp_port'] = 25;
$rcmail_config['smtp_user'] = '%u';
$rcmail_config['smtp_pass'] = '%p';
$rcmail_config['smtp_auth_type'] = '';//I don't know here how to write.

[SKaero]

Enable smtp_debug and post the log here.