Please try setting the E-mail settings
in the markup of the RadSocialShare (the EmailSettings inner tag). It is possible that for some reason they are not read properly from the web.config.
I would also advise that you examine the exact response from the server to see what the actual error is. Details on how to accomplish this are available in this thread
. As noted in the last post - we use standard .NET classes for the mail functionality, so if the server does not refuse the message there shouldn't be a problem.
Alternatively, you may look into the MailTo button that uses the client machine's mail client.
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