如何在邮件ID文本框中的@符号后仅允许三个点... [英] How to allow only three dots after @ symbol in the mail id text box...

问题描述

先生

我可以在邮件ID中的@之前添加多个点，但是在@符号之后，我只允许添加三个点.不允许超过三个点.例如:[e-mail].我必须在@符号后允许三个点.

Sir

Before @ in the mail id i can able to add many dots, but after @ symbol i want to allow only three dots in it. more than three dots not allowed. Eg:[e-mail]. i have to allow three dots after the @ symbol.

推荐答案

尝试:

@(([^\.]*\.[^\.]*)?){1,3}

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