imap_last_error
    (PHP 3>= 3.0.12, PHP 4 )
imap_last_error -- 
     This function returns the last IMAP error (if any) that occurred
     during this page request
    
Description
string 
imap_last_error ( void )
     This function returns the full text of the last IMAP error
     message that occurred on the current page. The error stack is
     untouched; calling imap_last_error()
     subsequently, with no intervening errors, will return the same
     error.