diff --git a/mayordomo/__init__.py b/mayordomo/__init__.py
index aeca698..282acf7 100644
--- a/mayordomo/__init__.py
+++ b/mayordomo/__init__.py
@@ -132,7 +132,7 @@ async def enviarCorreosDominio(dominioid):
 						
 						if dkimKey is not None:							
 							mail2send = Parser(policy=default).parsestr(carta.contenido)						
-							mail2send['DKIM-Signature'] = dkim.sign(carta.contenido, b'mayordomo', b'ilab.cl', dkimKey, include_headers=[b'from', b'to', b'subject', b'message-id']).decode()[len("DKIM-Signature: "):]
+							mail2send['DKIM-Signature'] = dkim.sign(carta.contenido.encode(), b'mayordomo', b'ilab.cl', dkimKey, include_headers=[b'from', b'to', b'subject', b'message-id']).decode()[len("DKIM-Signature: "):]
 							
 							await smtp.sendmail(remitente.direccion, rcpt_to, mail2send.encode('utf-8'))