rouncube smtp problems

[Jan Kowalsky]

Hi Thomas,

thanks for reply.

Am 06.10.2015 um 20:25 schrieb Thomas Spuhler:
> On Tuesday, October 06, 2015 07:04:31 PM Jan Kowalsky wrote:
>> Hi all,
>>
>> maybe someone can help me with an roundcube smtp error. Just setup a new
>> roundcube server and configured it to use another mailserver for postfix
>> and cyrus.
>>
>> Everything is fine - except submission/sendig emails:
>>
>> I get the rouncube error:
>>
>> PHP Warning:  stream_socket_client(): unable to connect to
>> 10.0.0.123:587 (Die Wartezeit für die Verbindung ist abgelaufen) in
>> /usr/share/php/Net/Socket.php on line 139
>>
>> but the server 10.0.0.123 is definitely available:
>>
>>  nc -vz 10.0.0.123 587
>> mail.datenkollektiv.net [10.0.0.123] 587 (submission) open
>>
>> The routing table is also ok as the firewall settings are in my opinion.
>>
>> Another roundcube server in the same subnet can access the mailserver
>> without problems.
>>
>> I already set debug level of roundcube to 5 and smtp logs to true - but
>> I don't get further informations.

> 
> What is the result of nmap 10.0.0.123 from the server where roundcube is 
> installed
>

22/tcp  open  ssh
25/tcp  open  smtp
80/tcp  open  http
110/tcp open  pop3
143/tcp open  imap
443/tcp open  https
587/tcp open  submission
993/tcp open  imaps
995/tcp open  pop3s

as far as I see, this should be ok?

Best
Jan