Siempre que respondo un correo me s

Siempre que respondo un correo me sale el siguiente error: «No se puede enviar el mensaje de correo electrónico. El mensaje al que estás respondiendo o qué estás reenviando no existe en el servidor de correo. Se devolvió a la carpeta borradores». Luego voy a la carpeta borradores y le doy enviar de nuevo y ahora sí funciona. Las direcciones de correo a las que envío mensajes sí son sólidas y reales. ¿Qué sucede?

Resultados (inglés) 1:

Whenever I answer an email I get the following error: «not to send the e-mail message. The message you are responding to what are forwarding does not exist on the server. Returned to the folder drafts". Then I go to the drafts folder and give it to send back and now it works. The email addresses to which to send messages if are solid and real. What happens?

Resultados (inglés) 2:

Whenever I answer an email I get the following error: "Unable to send the email. The message you are replying or what are forwarding does not exist on the mail server. It was returned to the Drafts folder. " Then I go to the Drafts folder and I will send it back and now it works. Mail addresses to which I send messages themselves are solid and real. What's going on?

Resultados (inglés) 3:

Always answer an email, I get the following Error: "You can not send the e-mail message. The Message to which you"re replying to or Forwarding is not what are you in the mail server. Returned to the borradores» folder. Then I"m going to the drafts folder and I Send again and now it works. The email addresses that send messages are solid and real. What"s wrong?