When trying to add a new Save Action to a Web Forms for Marketers form and you get an alert telling you This action cannot be added. Your configuration does not support it.
Or your Send Email Message actions disappear from the item.
You should also see this message in your log files for all forms with the Send Email Message action.
WARN Web Forms for Marketers: the '{0E8906B3-99BA-421E-A74D-277ED17A32FD}' action cannot be usedException has been thrown by the target of an invocation. WARN Web Forms for Marketers: the '{0E8906B3-99BA-421E-A74D-277ED17A32FD}' action cannot be usedException has been thrown by the target of an invocation. WARN Web Forms for Marketers: the '{D4502A11-9417-4479-9F2A-485F45D2E2D0}' action cannot be usedException has been thrown by the target of an invocation.
Make sure your MailServer settings are set correctly in the Web.config or where ever you patch them, its worth checking http://[yourhostname]/sitecore/admin/showconfig.aspx
<setting name="MailServer" value="127.0.0.1"/>
<setting name="MailServerUserName" value=""/>
<setting name="MailServerPassword" value=""/>
<setting name="MailServerPort" value="25"/>
With valid settings the missing actions should show again and you will be able to add new Send Email Message actions to forms