def parse_and_validate_reply_to_address(address):
 (recipient, sep, domain) = address.partition('@')
 if ((not sep) or (not recipient) or (domain != g.modmail_email_domain)):
  return
 (main, sep, remainder) = recipient.partition('+')
 if ((not sep) or (not main) or (main != 'zendeskreply')):
  return
 try:
  (email_id, email_mac) = remainder.split('-')
 except ValueError:
  return
 expected_mac = hmac.new(g.secrets['modmail_email_secret'], email_id, hashlib.sha256).hexdigest()
 if (not constant_time_compare(expected_mac, email_mac)):
  return
 message_id36 = email_id
 return message_id36

def parse_and_validate_reply_to_address ( address ) : ( recipient , sep , domain ) = address . partition ( '@' ) if ( ( not sep ) or ( not recipient ) or ( domain != g . modmail_email_domain ) ) : return ( main , sep , remainder ) = recipient . partition ( '+' ) if ( ( not sep ) or ( not main ) or ( main != 'zendeskreply' ) ) : return try : ( email_id , email_mac ) = remainder . split ( '-' ) except ValueError : return expected_mac = hmac . new ( g . secrets [ 'modmail_email_secret' ] , email_id , hashlib . sha256 ) . hexdigest ( ) if ( not constant_time_compare ( expected_mac , email_mac ) ) : return message_id36 = email_id return message_id36
validate the address and parse out and return the message id .