c＃验证电子邮件地址 [英] c# validate email address

问题描述

嗨CPians，

我正在开发软件，通过电子邮件将新闻通讯发送到地址列表。



当前版本通过正则表达式检查电子邮件地址的语法正确性，但我需要对电子邮件的存在进行真正的检查。



你能帮助我吗？谢谢

Hi CPians,
I am developing software for sending newsletters via e-mail to a list of addresses.

the current release checks the syntactic correctness of the email addresses through a regular expression, but I need to integrate a real check on the existence of the email.

Can you help me? Thank you

推荐答案

您无法验证电子邮件是否为正版。如果真正的电子邮件对您很重要，您需要通过验证链接向指定地址发送电子邮件。在提出问题之前，请先进行自己的基础研究，有很多相关文章。

You can't validate that an email is genuine. If genuine emails are important to you you'll need to send an email to the given address with a validation link. Also please do your own basic research before asking a question, there are a lot of articles concerning this already.

除非你发送电子邮件，否则无法检查电子邮件是否真实存在。你会得到答复。 ;）

There's no way to check if email exists in real, unless you send an email and you'll get a reply. ;)

如果通过真实检查电子邮件的存在，您的意思是实际验证电子邮件地址确实存在（并且不仅检查它是否格式正确），您可能会遇到一些困难时期。



实际上，SMTP协议中存在一个命令来检查域是否存在特定地址，但出于安全考虑，邮件服务器不允许外部使用。



所以，如果我是你，我会认真质疑这个要求。



希望这有帮助。

If, by "real check on the existence of the email", you mean actually validate that an email address really exists (and not only checking that it is well-formed), you may experience some hard times.

Indeed, there exists a command in the SMTP protocol to check a domain for the existence of a specific address, but for security reasons most mail servers do not allow its external use.

So, if I were you I would seriously question this requirement.

Hope this helps.

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