python中发送的smtp电子邮件中“From”字段的奇怪显示

Question

我在smtp中得到了来自字段的奇怪显示，email.The显示就像；

出发地: test@gmail.com To: test@gmail.com，Subject: Message test@gmail.com to:

“字段”为空白，但另一个“收件人”( test1@gmail.com成功地接收到了电子邮件)。下面是我的密码。

import smtplib

def SendEmailScenario1():
    gmail_user = "test@gmail.com"
    gmail_password = '******'

    sent_from = gmail_user
    to = ["test1@gmail.com"]
    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 = "test@gmail.com"
    gmail_password = '******'

    sent_from = gmail_user
    to = ["test1@gmail.com"]
    subject = 'Message'
    body = "Hi There! Done 2"

    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...')
SendEmailScenario1()
SendEmailScenario2()

如何在不使用MIMEText、MIMEMultipart的情况下将其正常显示

Answer 1

RFC822 指定，即报头应以'\r\n'终止

字段=字段名":“字段-主体CRLF

此外，头部应该是空的与身体分离 ( '\r\n' )。

主体与标头之间用空行(即在CRLF之前不带任何内容的行)分隔。

所以这个信息应该是这样构造的：

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

还请参阅smtplib文档中的示例。