用jinja做了个E-Letter小项目

用jinja做了个E-Letter小项目

做了一个html E-Letter项目.

邮件模板采用jinja2, html 邮件内容生成简直太爽了.

整个项目开发只用了2个小时, 调试却花了大半天时间, 生成的邮件总是发不出去.

于是, 打开 smtp 的debuglevel, 发现邮件已经mail queue了, 但就是收不到邮件. mail server是exchange. 之前用java写过类似的程序也没有问题(也是走smtp协议发送html邮件). 为什么这次用python实现却有问题?

怀疑过python smtp模块用法, 怀疑过python smtp的html写法, 怀疑过smtp subject和content不支持unicode. 最终都被排除.

最后终于定位到元凶: 邮件的subject只要包含"Please check."这13个字符, 邮件就会石沉大海. 难道是exchange server设了某种规则?

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资料:

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cnblogs 小五义的文章不错,  <>,

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代码结构

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下面简单描述一下项目的结构, 在我的脚手架项目基础上, 做了少量的裁剪, 并增加两个目录, scripts和templates, scripts目录存放E-Letter生成和发送脚本, templates目录存放E-Letter的模板.

并附上 mail_service.py, 修改了网上找的代码, 用来发送 html 邮件.

py_package

|--scripts

|--check1.py

|--check2.py

|--templates

|--check1.html

|--check2.html

# -*- coding: utf-8 -*-

#check1.py

'''Created on 2014-5-23''' from __future__ import absolute_import import jinja2 from jinja2.loaders import FileSystemLoaderdef get_template(file_name): ''' get template html with jinja2 format in templates folder ''' template_path=os.path.join(os.path.dirname(os.path.dirname(__file__)),'templates') template_env = jinja2.Environment(loader=FileSystemLoader(template_path)) return template_env.get_template(file_name)def check(): template=get_template('check1.html') something='something here' mail_body=template.render(something=something) mail_sender=HtmlMailSender() mail_subject='Some subject here' #mail_subject='Please check.' #cannot send out, why? mail_to=['a@corp.com','b.corp.com'] mail_cc=[] mail_sender.send_html_mail(mail_to,mail_cc,mail_subject,mail_body) # -*- coding: utf-8 -*-#conf.py '''Created on 2014-6-23'''from __future__ import absolute_importimport logging##logginglog_level=logging.INFO #email setting smtp_host="10.10.10.10" smtp_port=25 smtp_over_ssl=Falsemail_user="a@corp.com" mail_pwd="" # if no auth required, set pwd as empty# -*- coding: utf-8 -*-#mail_service.py '''Created on 2014-6-23'''from __future__ import absolute_importimport loggingfrom . import confclass HtmlMailSender(object): logger=logging.getLogger(__name__) def __init__(self): #read mail settings from configure file self.smtp_host=conf.smtp_host self.smtp_port=conf.smtp_port self.smtp_over_ssl=conf.smtp_over_ssl self.mail_user=conf.mail_user self.mail_pwd=conf.mail_pwd def send_html_mail(self, to_list, cc_list, subject, body): self.logger.info('send_html_mail() called.') import smtplib from email.mime.text import MIMEText from email.mime.multipart import MIMEMultipart # Construct email msgRoot = MIMEMultipart('related') msgRoot['Subject'] = subject msgRoot['From'] = self.mail_user msgRoot['To'] = ",".join(to_list) msgRoot['CC'] =",".join(cc_list) #msgRoot['BCC'] =",".join(cc_list) msgRoot.preamble = 'This is a multi-part message in MIME format.' # Encapsulate the plain and HTML versions of the message body in an # 'alternative' part, so message agents can decide which they want to display. msgAlternative = MIMEMultipart('alternative') msgRoot.attach(msgAlternative) #Add plain content msgText = MIMEText('This is HTML mail. If you see this message, which means you will not see the real mail content.','plain') msgAlternative.attach(msgText) #add html content msgText = MIMEText(body, 'html') msgAlternative.attach(msgText) try: if not self.smtp_over_ssl: if self.smtp_port=='': s = smtplib.SMTP(self.smtp_host) else: s = smtplib.SMTP(self.smtp_host, self.smtp_port) else: if self.smtp_port=='': s = smtplib.SMTP_SSL(self.smtp_host) else: s = smtplib.SMTP_SSL(self.smtp_host, self.smtp_port) s.set_debuglevel(True) # print stmp actions to stdout if self.mail_pwd : s.login(self.mail_user,self.mail_pwd) to_addrs=to_list+cc_list s.sendmail(self.mail_user ,to_addrs, msgRoot.as_string()) #s.sendmail(from_addr ,to_addrs, 'test message') s.quit() self.logger.info("""Mail sent. Find details below, to_list: %s cc_list: %s subject: %s body: %s"""%(to_list, cc_list, subject, body)) return True except Exception, ex: self.logger.exception(ex) return False

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