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In the last few days I've had complaints from clients that they can't send out email. It used to work fine before, but it probably broke on one of the latest updates.
They get the following error message on their Outlook: "None of the authentication methods supported by this client are supported by your server"
I've found a solution on http://kb.parallels.com/en/114417 . It doesn't say that it applies to Plesk 11.5, but it does.
You'd should check if there was a regression in one of the latest releases, and change the default setting to allow non-TLS connections, and add an option in the Plesk interface to force SSL if needed.
They get the following error message on their Outlook: "None of the authentication methods supported by this client are supported by your server"
I've found a solution on http://kb.parallels.com/en/114417 . It doesn't say that it applies to Plesk 11.5, but it does.
You'd should check if there was a regression in one of the latest releases, and change the default setting to allow non-TLS connections, and add an option in the Plesk interface to force SSL if needed.
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