为了提供学生和教师折扣，我如何以编程方式验证电子邮件地址是否归大学所有？
我会使用$email =~ /\.edu$/，但非美国大学不会将自己限制在.edu域中。
例如mail@cs.zu.de。
我会执行一个 SPARQL 查询，将电子邮件地址预处理到它的超级域 ( zu.de，然后搜索University主页 ( web.zu.de) 超级域 ( zu.de) 与电子邮件地址超级域匹配的对象，但是......
Wikipedia/dbpedia 没有针对每所大学的文章，有时不太受欢迎的大学会组合在一篇文章中。
所以我只能选择维护我自己的大学电子邮件地址数据库（糟糕），或者确定某种相同的开放数据库。有吗？
If you don't find a reliable university domain list, you might go with moderation: keep your own database of university domains, and only if you get an unrecognized domain, mark it as pending review, and have a real person verify if the domain belongs to a university or not, and then add it to your database as either belonging to a university or not. Then you could pre-populate your database with known universities (according to what you expect from your expected userbase), and blacklist major free email providers (i.e. mark as non-university), so you don't have to verify them one by one.
This approach has the additional benefit that you will end up with a filtered database of university-related email domains, which would be a useful resource which you can then offer as a service.