[horde] Connection refused "localhost:587" when sending mail

[Advrk Aplmrkt]

Hello,
I reached my postfix master.cf, which is part of the Kolab groupware
package's own postfix service. Here is the link to the contents in
pastebin: http://pastebin.com/nJXq5QpX

I did see a line called "submission" but can't tell if it is disabled.
If someone can look at it that would be great! I would love to solve
this problem as soon as possible.

Just to reiterate, I can't send mail using the Horde 3.3 web interface
running with Kolab groupware 2.3.2 with a connection refused error:

"There was an error sending your message: Failed to connect to
localhost:587 [SMTP: Failed to connect socket: Connection refused
(code: -1, response: )"

I turned OFF my firewall and it didn't help...

Thank you for your help.

On 23 June 2011 18:50, Reindl Harald <h.reindl at thelounge.net> wrote:
> Am 24.06.2011 00:20, schrieb Advrk Aplmrkt:
>> "There was an error sending your message: Failed to connect to
>> localhost:587 [SMTP: Failed to connect socket: Connection refused
>> (code: -1, response: )"
>>
>> The problem is, I completely *disabled* the firewall from the Firewall
>> GUI program in the Administration menu, and I don't know why it seem
>> to have permission problems, or ports being blocked.
>>
>> What should I check and change to fix this problem? And what does this
>> error mean anyway? Thanks for your help
>
> 587 is smptp submission and per default disabled in postfix master.cf
> and if enabled should pe properly configured
>
> localhost is normally not filtered by iptables