我的 python 脚本自动发送电子邮件有问题

问：

import smtplib
from email.message import EmailMessage

# Sender's email credentials
sender_email = "[email protected]"
password = "xxxxxx"

# List of recipient emails and sender names
recipients = {
    "[email protected]": "First Customer"
}

# Create a common message for all recipients
message = "Hello world!"
subject = "DEMO"

# Loop through recipients and send emails

for recipient_email, sender_name in recipients.items():
    msg = EmailMessage()
    msg.set_content(message)
    msg['Subject'] = subject
    msg['From'] = f"{sender_name} <{sender_email}>"
    msg['To'] = recipient_email

    with smtplib.SMTP_SSL('mail.webservermail.us', 465) as smtp:
        smtp.login(sender_email, password)
        smtp.send_message(msg)

问题仅出在outlook/hotmail上。 即使没有删除或打开它，电子邮件也只有第一次进入垃圾邮件。