域名与邮箱的区别

import dns.resolver

def resolve_domain(domain):
    try:
        answers = dns.resolver.resolve(domain, 'A')
        for rdata in answers:
            print(f'{domain} resolves to {rdata}')
    except dns.resolver.NXDOMAIN:
        print(f'{domain} does not exist.')
    except dns.resolver.NoAnswer:
        print(f'{domain} has no A records.')
    except dns.resolver.Timeout:
        print(f'Query timed out.')

resolve_domain('example.com')

import smtplib
from email.mime.text import MIMEText

def send_email(sender, receiver, subject, message):
    msg = MIMEText(message)
    msg['Subject'] = subject
    msg['From'] = sender
    msg['To'] = receiver

    try:
        smtp_server = smtplib.SMTP('smtp.example.com', 587)
        smtp_server.starttls()
        smtp_server.login(sender, 'password')
        smtp_server.sendmail(sender, receiver, msg.as_string())
        smtp_server.quit()
        print('Email sent successfully.')
    except Exception as e:
        print(f'Failed to send email: {e}')

send_email('sender@example.com', 'receiver@example.com', 'Test Email', 'This is a test email.')