python 收发邮件

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今天记录一下如何使用python收发邮件,知识要点在python内置的poplib和stmplib模块的使用上。

1. 准备工作

首先,我们需要有一个测试邮箱,我们使用新浪邮箱,而且要进行如下设置:

在新浪邮箱首页的右上角找到设置->更多设置,然后在左边选择“客户端/pop/imap/smtp”:

最后,将Pop3/smtp服务的服务状态打开即可:

2. poplib接收邮件

首先,介绍一下poplib登录邮箱和下载邮件的一些接口:

        self.popHost = 'pop.sina.com'
        self.smtpHost = 'smtp.sina.com'
        self.port = 25
        self.userName = '[email protected]'
        self.passWord = 'xxxxxx'
        self.bossMail = '[email protected]'

我们需要如上一些常量,用于指定登录邮箱以及pop,smtp服务器及端口。我们调用poplib的POP3_SSL接口可以登录到邮箱。

    # 登录邮箱
    def login(self):
        try:
            self.mailLink = poplib.POP3_SSL(self.popHost)
            self.mailLink.set_debuglevel(0)
            self.mailLink.user(self.userName)
            self.mailLink.pass_(self.passWord)
            self.mailLink.list()
            print u'login success!'
        except Exception as e:
            print u'login fail! ' + str(e)
            quit()

在登录邮箱的时候,很自然,我们需要提供用户名和密码,如上述代码所示,使用非常简单。

登录邮箱成功后,我们可以使用list方法获取邮箱的邮件信息。我们看到list方法的定义:

    def list(self, which=None):
        """Request listing, return result.

        Result without a message number argument is in form
        ['response', ['mesg_num octets', ...], octets].

        Result when a message number argument is given is a
        single response: the "scan listing" for that message.
        """
        if which is not None:
            return self._shortcmd('LIST %s' % which)
        return self._longcmd('LIST')
我们看到list方法的注释,其中文意思是,list方法有一个默认参数which,其默认值为None,当调用者没有给出参数时,该方法会列出所有邮件的信息,其返回形式为 [response, ['msg_number, octets', ...], octets],其中,response为响应结果,msg_number是邮件编号,octets为8位字节单位。我们看一看具体例子:

('+OK ', ['1 2424', '2 2422'], 16)

这是一个调用list()方法以后的返回结果。很明显,这是一个tuple,第一个值sahib响应结果'+OK',表示请求成功,第二个值为一个数组,存储了邮件的信息。例如'1 2424'中的1表示该邮件编号为1。

下面我们再看如何使用poplib下载邮件。

    # 获取邮件
    def retrMail(self):
        try:
            mail_list = self.mailLink.list()[1]
            if len(mail_list) == 0:
                return None
            mail_info = mail_list[0].split(' ')
            number = mail_info[0]
            mail = self.mailLink.retr(number)[1]
            self.mailLink.dele(number)

            subject = u''
            sender = u''
            for i in range(0, len(mail)):
                if mail[i].startswith('Subject'):
                    subject = mail[i][9:]
                if mail[i].startswith('X-Sender'):
                    sender = mail[i][10:]
            content = {'subject': subject, 'sender': sender}
            return content
        except Exception as e:
            print str(e)
            return None
poplib获取邮件内容的接口是retr方法。其需要一个参数,该参数为要获取的邮件编号。下面是retr方法的定义:

    def retr(self, which):
        """Retrieve whole message number 'which'.

        Result is in form ['response', ['line', ...], octets].
        """
        return self._longcmd('RETR %s' % which)
我们看到注释,可以知道,retr方法可以获取指定编号的邮件的全部内容,其返回形式为 [response, ['line', ...], octets],可见,邮件的内容是存储在返回的tuple的第二个元素中,其存储形式为一个数组。我们测试一下,该数组是怎么样的。


我们可以看到,这个数组的存储形式类似于一个dict!于是,我们可以据此找到任何我们感兴趣的内容。例如,我们的示例代码是要找到邮件的主题以及发送者,就可以按照上面的代码那样编写。当然,你也可以使用正则匹配~~~ 下面是测试结果:

嗯...大家可以自己试一下。

3. smtp发送邮件

和pop一样,使用smtp之前也要先给它提供一些需要的常量:

            self.mail_box = smtplib.SMTP(self.smtpHost, self.port)
            self.mail_box.login(self.userName, self.passWord)
上面是使用smtp登录邮箱的代码,和pop类似。下面给出使用smtp发送邮件的代码,你会看到python是多么的简单优美!

    # 发送邮件
    def sendMsg(self, mail_body='Success!'):
        try:
            msg = MIMEText(mail_body, 'plain', 'utf-8')
            msg['Subject'] = mail_body
            msg['from'] = self.userName
            self.mail_box.sendmail(self.userName, self.bossMail, msg.as_string())
            print u'send mail success!'
        except Exception as e:
            print u'send mail fail! ' + str(e)
这就是python用smtp发送邮件的代码!很简单有木有!很方便有木有!很通俗易懂有木有!这里主要就是sendmail这个方法,指定发送方,接收方和邮件内容就可以了。还有MIMEText可以看它的定义如下:
class MIMEText(MIMENonMultipart):
    """Class for generating text/* type MIME documents."""

    def __init__(self, _text, _subtype='plain', _charset='us-ascii'):
        """Create a text/* type MIME document.

        _text is the string for this message object.

        _subtype is the MIME sub content type, defaulting to "plain".

        _charset is the character set parameter added to the Content-Type
        header.  This defaults to "us-ascii".  Note that as a side-effect, the
        Content-Transfer-Encoding header will also be set.
        """
        MIMENonMultipart.__init__(self, 'text', _subtype,
                                  **{'charset': _charset})
        self.set_payload(_text, _charset)
看注释~~~ 这就是一个生成指定内容,指定编码的MIME文档的方法而已。顺便看看sendmail方法吧~~~

    def sendmail(self, from_addr, to_addrs, msg, mail_options=[],
                 rcpt_options=[]):
        """This command performs an entire mail transaction.

        The arguments are:
            - from_addr    : The address sending this mail.
            - to_addrs     : A list of addresses to send this mail to.  A bare
                             string will be treated as a list with 1 address.
            - msg          : The message to send.
            - mail_options : List of ESMTP options (such as 8bitmime) for the
                             mail command.
            - rcpt_options : List of ESMTP options (such as DSN commands) for
                             all the rcpt commands.
嗯...使用smtp发送邮件的内容大概就这样了。

4. 源码及测试

# -*- coding:utf-8 -*-
from email.mime.text import MIMEText
import poplib
import smtplib


class MailManager(object):

    def __init__(self):
        self.popHost = 'pop.sina.com'
        self.smtpHost = 'smtp.sina.com'
        self.port = 25
        self.userName = '[email protected]'
        self.passWord = 'xxxxxx'
        self.bossMail = '[email protected]'
        self.login()
        self.configMailBox()

    # 登录邮箱
    def login(self):
        try:
            self.mailLink = poplib.POP3_SSL(self.popHost)
            self.mailLink.set_debuglevel(0)
            self.mailLink.user(self.userName)
            self.mailLink.pass_(self.passWord)
            self.mailLink.list()
            print u'login success!'
        except Exception as e:
            print u'login fail! ' + str(e)
            quit()

    # 获取邮件
    def retrMail(self):
        try:
            mail_list = self.mailLink.list()[1]
            if len(mail_list) == 0:
                return None
            mail_info = mail_list[0].split(' ')
            number = mail_info[0]
            mail = self.mailLink.retr(number)[1]
            self.mailLink.dele(number)

            subject = u''
            sender = u''
            for i in range(0, len(mail)):
                if mail[i].startswith('Subject'):
                    subject = mail[i][9:]
                if mail[i].startswith('X-Sender'):
                    sender = mail[i][10:]
            content = {'subject': subject, 'sender': sender}
            return content
        except Exception as e:
            print str(e)
            return None

    def configMailBox(self):
        try:
            self.mail_box = smtplib.SMTP(self.smtpHost, self.port)
            self.mail_box.login(self.userName, self.passWord)
            print u'config mailbox success!'
        except Exception as e:
            print u'config mailbox fail! ' + str(e)
            quit()

    # 发送邮件
    def sendMsg(self, mail_body='Success!'):
        try:
            msg = MIMEText(mail_body, 'plain', 'utf-8')
            msg['Subject'] = mail_body
            msg['from'] = self.userName
            self.mail_box.sendmail(self.userName, self.bossMail, msg.as_string())
            print u'send mail success!'
        except Exception as e:
            print u'send mail fail! ' + str(e)

if __name__ == '__main__':
    mailManager = MailManager()
    mail = mailManager.retrMail()
    if mail != None:
        print mail
        mailManager.sendMsg()
上述代码先登录邮箱,然后获取其第一封邮件并删除之,然后获取该邮件的主题和发送方并打印出来,最后再发送一封成功邮件给另一个bossMail邮箱。

测试结果如下:

好的,大家可以把上面的代码复制一下,自己玩一下呗~~~

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转载自blog.csdn.net/Ivan_zgj/article/details/51013833