Require clients to connect with SSL
Hey all.
So, i was just revising some of our server's configurations, and noticed that the option "Require clients to connect with SSL or issue the STARTTLS command before they are allowed to authenticate with the server. " was turned off. When i turned it on, i started receiving messages from some users that their email wasn't working anymore. No matter what method i tried for connection (ssl/tls ports) it wouldn't let them connect and send/receive emails. What exactly is going on here? We use outlook as our email client, and only some machines had trouble with this option turned on.
Appreciate any help.
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Hey there! You'll likely need to perform specific troubleshooting with those clients as the issue wasn't affecting everyone, so the problem isn't on the cPanel or server side.
Do you have a specific error message you can share that could point us in the right direction?
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hey Rex, thanks for the reply...
so, pretty much all of our printers stopped sending emails (scan to mail) and some older, legacy machines we still have on as well
the messages we got from the older machine with older outlook version was "your server does not support the connection encryption type you have specified" or "a secure connection to the server cannot be established" and the printer error was a more general "the transmission has failed" kinda of message
i was thinking maybe it's something to do with the certificates from those older machines, but if you have any idea on what might be going on, please let me know
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Thanks for the additional details. It makes since that older machines that aren't receiving updates would have issues, since they may not contain the correct certificate bundles or may not be able to handle the increased security.
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