在python发送的smtp电子邮件中奇怪显示“发件人”字段

问题描述

我在smtp电子邮件中收到发件人字段的奇怪显示。

发件人：[email protected]收件人：[email protected]，主题：邮件 [email protected] 到：

“

收件人”字段为空白，但另一个“收件人”收件人，即[email protected]已成功收到电子邮件。下面是我的代码。

import smtplib

def SendEmailScenario1():
    gmail_user = "[email protected]"
    gmail_password = '******'

    sent_from = gmail_user
    to = ["[email protected]"]
    subject = 'Message'
    body = "Hi There! Done1"

    email_text = """\
    From: %s 
    To: %s 
    Subject: %s

    %s
    """ % (sent_from,",".join(to),subject,body)
    try:
        server = smtplib.SMTP_SSL('smtp.gmail.com',465)
        server.ehlo()
        server.login(gmail_user,gmail_password)
        server.sendmail(sent_from,to,email_text)
        server.close()

        print ('Email sent!')
    except:
        print ('Something went wrong...')
def SendEmailScenario2():
    gmail_user = "[email protected]"
    gmail_password = '******'

    sent_from = gmail_user
    to = ["[email protected]"]
    subject = 'Message'
    body = "Hi There! Done 2"

    email_text = """\
    From: %s 
    To: %s 
    Subject: %s

    %s
    """ % (sent_from,email_text)
        server.close()

        print ('Email sent!')
    except:
        print ('Something went wrong...')
SendEmailScenario1()
SendEmailScenario2()

如何在不使用 MIMEText，MIMEMultipart

的情况下将其正常显示

解决方法

RFC822 specifies，标头应以'\r\n'结尾：

field =字段名“：” [field-body] CRLF

此外，标头应由一个空白的'\r\n' separated from the body：

[正文]与标头之间用空行分隔（即，行，CRLF之前没有任何内容）

因此，消息的结构应如下：

headers = "From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n"
email_text = headers + body

另请参见smtplib docs中的示例。

python smtplib