正则表达式：电子邮件地址中的多个子域

Question

It wasn't hard to find everything between the @ character, but the problem is that I need every word before the . (dot) character.

If the email, for example, is: studentname@student.studentschool.com , then I need to have the every word after the @ character and before every . (dot).

student  
studentschool

What I tried so far only works for one domain.

(?<=@)[A-Za-z]{2,40}

Can't figure it out.

Answer 1

Easy! Try this:

([^.@]+)\.

Demo: https://regex101.com/r/nM4jV7/2

Explanation:

Get everything that's just before a dot, but doesn't consist @ . Then capture the string in a group, excluding the ending dot.