def _remove_leading_dots_for_smtp_transparency_support(self, input_data):
regex = re.compile('<STR_LIT>', re.MULTILINE)<EOL>data_without_transparency_dots = regex.sub('<STR_LIT:.>', input_data)<EOL>return re.sub('<STR_LIT:\r\n>', '<STR_LIT:\n>', data_without_transparency_dots)<EOL>
Uses the input data to recover the original payload (includes
        transparency support as specified in RFC 821, Section 4.5.2).