There is no reason this error should occur unless you manually altered mail-lib. Why you would do so is beyond me... *L*
It is difficult, if not completely impossible to properly diagnose most UBB problems without knowing which version of the UBB you are using, as well as the EXACT URL to your Ultimate.cgi, (NOT a link to your webpage). Please provide this information. Thanks. <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />
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Charles Capps, Moderator, Post-Install Troubleshooting
PLEASE NOTE: Due to time limitations, I do not provide UBB support via email.