Python script to send mail via Apple's iCloud. Be sure to setup an app specific password for and do not use or expose your iCloud password. https://support.apple.com/en-us/HT204397

smtp_icloud.py

import smtplib

#email.mime.multipart is specific to python3
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText

msg = MIMEMultipart()
msg['From'] = '[email protected]'
msg['To'] = '[email protected]'
msg['Subject'] = 'Subject'
message = 'Message body'
msg.attach(MIMEText(message))

mailserver = smtplib.SMTP('smtp.mail.me.com', 587)
# identify ourselves
mailserver.ehlo()
# secure our email with tls encryption
mailserver.starttls()
# re-identify ourselves as an encrypted connection
mailserver.ehlo()
mailserver.login('iCloud ID', 'app-specific password')
mailserver.sendmail('[email protected]',
                    '[email protected]', msg.as_string())

mailserver.quit()

Maybe try something like this?

#  Once the folder/mailbox is selected, the NumMessages property
#  will contain the number of emails in the mailbox.
#  Loop from 1 to NumMessages to fetch each email by sequence number.

n = imap.get_NumMessages()
bUid = False
for i in range(1,(n)-1):

    #  Download the email by sequence number.

    email = imap.FetchSingle(i,bUid)
    if (imap.get_LastMethodSuccess() != True):
        print(imap.lastErrorText())
        sys.exit()

    print(str(i) + ": " + email.ck_from())
    print("    " + email.subject())
    print("-")

#  Disconnect from the IMAP server.
success = imap.Disconnect()

What example did you use?

.get_NumMessages is not an IMAP4 command for me.

Exception has occurred: AttributeError
Unknown IMAP4 command: 'get_NumMessages'
File "/Users/lars/Desktop/Test/Test-Env/src/email.py", line 25, in
n = mail.get_NumMessages()