SMTP Connection to server not possible

[Numelle]

Hi all,

I have the issue that rainloop does not connect to all necessary SMTP servers. (Installed version is 1.6.9.167) The server I want to connect to is the mailserver for my own domain, hosted by a Third-Party Unit. Hence I do not have access to the Webserver itself. When I provide the address of my SMTP server to rainloop and click "Testconnection" it test for about 5 seconds and then says "Connection Timeout". If I connect this SMTP server with other Webbased sending tools (GMAIL,GMX,...) I perfectly can connect to this SMTP server and also send mails.
The security settings have been checked and compared with the working PHP Webmailers. Additionally I changed the security settings within Rainloop to verify whether there is another Sec. setting necessary but then after "Test Connection" it directly says "Connection Timed out"
According to my test I assume that the server in general is reachable but does not accept the SMTP request via PHP.

This brings me to my questions:

• Are you able to determine the difference between Rainloop and other WebmailClients and Make the same changes to the Rainloop PHP SMTP send script?
• Is this a known behaviour and do you have any information I can provide to my administrator like: "Change this setting and this setting and it works like charme....." ;-)
• According to the Changelog New Version 1.6.10.182 doesn't solve this behaviour, should I install anyway?
• Can I do anything directly for testing and providing you the corresponding information?

Many thanks for your support

Numelle

[Numelle]

Is there any news around this issue?
Thanks for your investigation ;-)

regards

[RainLoop]

Maybe your hoster provider is blocking SMTP port.
Try to ask them.

[Numelle]

Thanks for your reply. This was the first thing I already checked. The thing is: Access to SMTP is working via Mail (MAC), Outlook, GMX & Gmail to that domain. As it is working with GMX and GMAIL I assume that the PHP SMTP function also works. According to the information by the admin of that domain there is also no domain based blocking. Is there anything you can provide me I can tell my technician to check on server side.

[RainLoop]

You need to test smpt connection FROM web server there RainLoop Webmail installed.

[Numelle]

Hello team, this has also been tested and verified with working. So to be honest I doubt there is a port issue. Could you basically provide me some kind of information how the SMTP connection is established via Rainloop? As it is a WebApplication and supposed to work with a webserver I doubt, that it needs access to any local mailserver? Unfortunately I am not used to PHP functions like this but I think this would be information necessary for the technician hosting the remote SMTP server I want to access to.
Many thanks and regards

Numelle

[deMattin]

I have this or a similar problem with a freemailer as well (installed Version 1.7.1.21).

It's not possible to smtp-connect to "freenet.de".
Other mail-domains in my configuration work fine with ssl/tls or starttls.
Here you can see the recommendet settings for "freenet":
http://email-hilfe.freenet.de/documents/Beitrag/15916/einstellungen-serverdaten-fuer-alle-e-mail-programme
which work fine with desktop emails-clients.

IMAP-Settings in rainloop work, but no chance to get a working smtp-setting in any suggested possible combination.
If you configure the server settings in rainloop admin and "test" it, you mostly get a "550 Administrative prohibition":

If you setup ssl/tsl with port 587 you get:

[RainLoop]

1. The following settings are correct:
   mx.freenet.de:587
   STARTTLS

Try to send message.

2. test function is not working for this domain (will be fixed in the next version)

[deMattin]

Thanks. It works!
I didn't try to send a mail because of the failed test in server settings.

[cfbear3]

i am having the same problem.... but with a block550... how to fix it??? thanks...