怎么给域名邮箱发邮件

import smtplib
from email.mime.text import MIMEText
from email.header import Header

# 邮件服务器配置
smtp_server = 'smtp.yourdomain.com'
smtp_port = 587
smtp_username = 'your_email@yourdomain.com'
smtp_password = 'your_email_password'

# 收件人信息
receiver = 'receiver@example.com'

# 邮件内容
message = MIMEText('这是一封测试邮件', 'plain', 'utf-8')
message['From'] = Header("发件人昵称", 'utf-8')
message['To'] = Header("收件人昵称", 'utf-8')
message['Subject'] = Header("测试邮件主题", 'utf-8')

# 发送邮件
try:
    smtp_obj = smtplib.SMTP(smtp_server, smtp_port)
    smtp_obj.starttls()  # 启动TLS加密
    smtp_obj.login(smtp_username, smtp_password)
    smtp_obj.sendmail(smtp_username, receiver, message.as_string())
    print("邮件发送成功")
except smtplib.SMTPException as e:
    print("Error: 无法发送邮件", e)
finally:
    smtp_obj.quit()