用于验证电子邮件的函数(识别IDN)

Django支持从1.2版开始的IDN电子邮件验证。

请参见此处的验证代码: http://code.djangoproject.com/svn/django/trunk/django/core/validators.py

参考文献: http://docs.djangoproject.com/en/1.2/ref/forms/fields/#emailfield

例子:

Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41) 
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from django.core.validators import validate_email
>>> try: validate_email(u'user@example.com'); print "passed"
... except: print "failed"
... 
passed
>>> try: validate_email(u'user@zääz.de'); print "passed"
... except: print "failed"
... 
passed
>>> try: validate_email(u'user@納豆.ac.jp'); print "passed"
... except: print "failed"
... 
passed
>>> try: validate_email(u'this-should-fail@@納豆.ac.jp'); print "passed"
... except: print "failed"
... 
failed

在使用Django模块之前,您可能需要定义一些环境设置,请参阅以下文档: http://docs.djangoproject.com/en/dev/

由于语法非常灵活,验证电子邮件地址非常困难。最好的策略是将测试电子邮件发送到输入的地址。

我认为最好的方法是通过HTTP请求打开邮件服务器端口,看看它是否响应。

web = httplib.HTTPConnection(domain, 25, timeout=5)
web.connect()

检查一下是否打开了。