正则表达式 - 获取电子邮件和数据

I have a error of my program to send emails. Now i have the files where are exported e-mail's. Searching of regular expression, what can get me only the email in Return-Path.

  Some content
  Return-Path: <email@domain.com>
  Some content

This regex should do what you want:

(?=Return-Path:)([^
]*)<([^>]*)>

Demo: https://regex101.com/r/oL9kE8/2