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Send mail to SMTP server on port 443

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11 years 2 months ago #91581 by stevage
Send mail to SMTP server on port 443 was created by stevage
Hi all,
I've recently set up a specialised mail server that listens on port 443 (because the infrastructure it's on won't allow it to listen on port 25). I've configured LimeSurvey (running on LimeService) to use it, but it apparently can't reach it (Error Message: SMTP Error: Could not connect to SMTP host.) No connection of any kind is received from the server side.

In LimeSurvey, the settings are:
Email method: SMTP
SMTP host: 115.146.<see below>.182:443
SMTP username:
SMTP password:
SMTP SSL/TLS: Off
SMTP Debug: Always

(The missing part of the IP address above is eighty-five.)

I can connect to this server fine from my laptop, so I'm wondering:
1) Is there some reason LimeSurvey/LimeService would refuse to connect to this server on this port?
2) Could someone try to connect to this mail server? You can't actually send mail to anyone, but would love to know if you can at least connect.
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11 years 2 months ago #91609 by helper
Replied by helper on topic Send mail to SMTP server on port 443
My first thought here is that the standard SSL port allows for a browser to connect, but there may not be any SMTP service available at that point. Try this: technet.microsoft.com/en-us/library/aa99...28v=exchg.65%29.aspx (yes, I know it is for Exchange, but the telnet and SMTP answer should be the same). Post your results.
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5 years 6 months ago - 5 years 6 months ago #174400 by carldivin
Replied by carldivin on topic Send mail to SMTP server on port 443
TCP port 443 is the default port used by HTTPS. If this port is blocked on any server or device from your computer to a given destination, such as www.Microsoft.com , your connection to any https site will fail and your browser will return an error message like "Secure Connection Failed" or "Page Cannot be Displayed" . However, the two most common locations for this failure are at your workstation or router. Moreover, if you can access the html page at your root domain (say example.com/ ), but pages in a directory like example.com/ give you a 404 Not Found error.
Last edit: 5 years 6 months ago by DenisChenu. Reason: Usage of example.com
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5 years 6 months ago #174403 by DenisChenu
Replied by DenisChenu on topic Send mail to SMTP server on port 443

Assistance on LimeSurvey forum and LimeSurvey core development are on my free time.
I'm not a LimeSurvey GmbH member, professional service on demand , plugin development .
I don't answer to private message.
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