Hola: Me aparece el siguiente error en calibre y no sé cómo solucionarlo: Starting job: Enviar Esperando al diluvio (Áncora & Delfín) (Spanish Edition) por correo electrónico a ROPERO1972_PCQSGO@kindle.com Sending failed... Traceback (most recent call last): File "calibre\gui2\email.py", line 47, in run File "calibre\gui2\email.py", line 136, in sendmail File "calibre\utils\smtp.py", line 162, in sendmail File "calibre\utils\smtp.py", line 142, in sendmail_direct OSError: Failed to send mail: SMTPRecipientsRefused({'ROPERO1972_PCQSGO@kindle.c om': (550, b'5.7.1 IP address blacklisted by recipient')}) Retrying in 1 seconds... Waiting 1 seconds before sending, to avoid being marked as spam. You can control this delay via Preferences->Tweaks Sending failed... Traceback (most recent call last): File "calibre\gui2\email.py", line 47, in run File "calibre\gui2\email.py", line 136, in sendmail File "calibre\utils\smtp.py", line 162, in sendmail File "calibre\utils\smtp.py", line 142, in sendmail_direct OSError: Failed to send mail: SMTPRecipientsRefused({'ROPERO1972_PCQSGO@kindle.c om': (550, b'5.7.1 IP address blacklisted by recipient')}) Job: "Enviar Esperando al diluvio (Áncora & Delfín) (Spanish Edition) por correo electrónico a ROPERO1972_PCQSGO@kindle.com" failed with error: Traceback (most recent call last): File "calibre\gui2\threaded_jobs.py", line 82, in start_work File "calibre\gui2\email.py", line 104, in __call__ File "calibre\gui2\email.py", line 47, in run File "calibre\gui2\email.py", line 136, in sendmail File "calibre\utils\smtp.py", line 162, in sendmail File "calibre\utils\smtp.py", line 142, in sendmail_direct OSError: Failed to send mail: SMTPRecipientsRefused({'ROPERO1972_PCQSGO@kindle.c om': (550, b'5.7.1 IP address blacklisted by recipient')}) Called with args: ('C:\\Users\\TERESA~1\\AppData\\Local\\Temp\\calib re_12o6z4ov\\l9yht2fpcaltmpfmt.epub', 'Esperando al diluvio (Ancora & Delfin) (Spanish Edition).epub', 'ROPERO1972_PCQSGO@kindle.com', 'KFIWaglmyVLDkRkY8INkn3', 'Gadm7Fx6Z22HFy7KutqZZ7') {'notifications': <queue.Queue object at 0x000001D1C6A59C60>, 'abort': <threading.Event object at 0x000001D1C6A59EA0>, 'log': <calibre.utils.logging.GUILog object at 0x000001D1C6A5A020>}