如何使用Python的smtplib发送电子邮件中的换行符？ [英] How to get line breaks in e-mail sent using Python's smtplib?

问题描述

我写了一个脚本，将消息写入文本文件，并将其作为电子邮件发送。
一切顺利，电子邮件终于似乎全部在一行。

我通过 \\\
添加换行符，它适用于文本文件，但不适用于电子邮件。
你知道可能的原因是什么？

---

这是我的代码：

  import smtplib，sys 
 import traceback 
 def send_error（发件人，收件人，标题，正文）：
 
 SMTP_SERVER ='smtp.gmail.com'
 SMTP_PORT = 587 
 session = smtplib.SMTP（'smtp.gmail.com'，587）
 session.ehlo（）
 session.starttls（）
 session.ehlo 
 session.login（sender，'my password'）
 send_it = session.sendmail（sender，recipient，headers +\r\ n\\\\
+ body）
 session.quit（）
 return send_it 
 
 
 SMTP_SERVER ='smtp.gmail.com'
 SMTP_PORT = 587 
 sender ='[e-mail]'
 recipient ='[e-mail]'
 subject ='report'
 body =亲爱的学生， \\ n请发送您的报告\感谢您的关注
打开（'student.txt'，'w'）。write（body）
 
 headers = [From ：+ sender，
主题：+ subject，
To：+ recipient，
MIME-Version：1.0，
Content-Type： html] 
 headers =\r\\\
.join（headers）
 send_error（发件人，收件人，标题，正文）
  

解决方案

您的邮件正文声明为HTML内容（Content-Type：text / html ）。换行符的HTML代码是 < br> 。您应该将您的内容类型更改为 text / plain 或使用HTML标记进行换行符，而不是简单的 \\\
因为后者在呈现HTML文档时被忽略。

---

作为附注，还可以看看<一个href =http://docs.python.org/2/library/email.html =nofollow noreferrer>电子邮件包。有些类可以简化电子邮件的定义（ with例如：

例如，您可以尝试（未经测试）：

 code> import smtplib 
 from email.mime.text import MIMEText 
 
＃define content 
 recipients = [[e-mail]] 
发件人=[e-mail]
 subject =report reminder
 body =
亲爱的学生，
请发送您的报告
感谢您的注意

 
＃补充消息
 msg = MIMEText（body）
 msg ['Subject'] = subject 
 msg ['From '] = sender 
 msg ['To'] =，.join（recipient）
 
＃发送
会话= smtplib.SMTP（'smtp.gmail.com' ，587）
 session.starttls（）
 session.login（发件人，我的密码）
 send_it = session.sendmail（发件人，收件人，msg.as_string（））
 session.quit（）
  

I have written a script that writes a message to a text file and also sends it as an email. Everything goes well, except the email finally appears to be all in one line.

I add line breaks by \n and it works for the text file but not for the email. Do you know what could be the possible reason?

---

Here's my code:

import smtplib, sys
import traceback
def send_error(sender, recipient, headers, body):

    SMTP_SERVER = 'smtp.gmail.com'
    SMTP_PORT = 587
    session = smtplib.SMTP('smtp.gmail.com', 587)
    session.ehlo()
    session.starttls()
    session.ehlo
    session.login(sender, 'my password')
    send_it = session.sendmail(sender, recipient, headers + "\r\n\r\n" +  body)
    session.quit()
    return send_it


SMTP_SERVER = 'smtp.gmail.com'
SMTP_PORT = 587
sender = '[e-mail]'
recipient = '[e-mail]'
subject = 'report'
body = "Dear Student, \n Please send your report\n Thank you for your attention"
open('student.txt', 'w').write(body) 

headers = ["From: " + sender,
               "Subject: " + subject,
               "To: " + recipient,
               "MIME-Version: 1.0",
               "Content-Type: text/html"]
headers = "\r\n".join(headers)
send_error(sender, recipient, headers, body)

解决方案

You have your message body declared to have HTML content ("Content-Type: text/html"). The HTML code for line break is <br>. You should either change your content type to text/plain or use the HTML markup for line breaks instead of plain \n as the latter gets ignored when rendering a HTML document.

---

As a side note, also have a look at the email package. There are some classes that can simplify the definition of E-Mail messages for you (with examples).

For example you could try (untested):

import smtplib
from email.mime.text import MIMEText

# define content
recipients = ["[e-mail]"]
sender = "[e-mail]"
subject = "report reminder"
body = """
Dear Student,
Please send your report
Thank you for your attention
"""

# make up message
msg = MIMEText(body)
msg['Subject'] = subject
msg['From'] = sender
msg['To'] = ", ".join(recipients)

# sending
session = smtplib.SMTP('smtp.gmail.com', 587)
session.starttls()
session.login(sender, 'my password')
send_it = session.sendmail(sender, recipients, msg.as_string())
session.quit()

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