Sendmail 与 SMTP

当谈到电子邮件通信时，Sendmail 和 SMTP（简单邮件传输协议）都是不可忽视的关键要素。Sendmail 是一个古老而强大的邮件传输代理程序，而SMTP 则是互联网上用于发送和接收电子邮件的标准协议。本文将深入探讨 Sendmail 和 SMTP 的工作原理，以及它们在电子邮件通信中的作用。我们还将介绍一些实际的案例代码，帮助读者更好地理解这两者之间的关系。

python
import smtplib
from_email = "your_email@example.com"
to_email = "recipient@example.com"
message = "这是一封测试邮件。"
smtp_server = "smtp.example.com"
smtp_port = 587
try:
    server = smtplib.SMTP(smtp_server, smtp_port)
    server.starttls()
    server.login(from_email, "your_password")
    server.sendmail(from_email, to_email, message)
    server.quit()
    print("邮件已成功发送！")
except Exception as e:
    print(f"发送邮件时出现错误：{str(e)}")

python
import smtplib
from email.mime.text import MIMEText
from_email = "your_email@example.com"
to_email = "recipient@example.com"
subject = "测试邮件"
message = "这是一封测试邮件。"
smtp_server = "smtp.example.com"
smtp_port = 587
# 创建 MIME 文本对象
msg = MIMEText(message)
msg["Subject"] = subject
msg["From"] = from_email
msg["To"] = to_email
try:
    server = smtplib.SMTP(smtp_server, smtp_port)
    server.starttls()
    server.login(from_email, "your_password")
    server.sendmail(from_email, to_email, msg.as_string())
    server.quit()
    print("邮件已成功发送！")
except Exception as e:
    print(f"发送邮件时出现错误：{str(e)}")