Get piece of message from huge message

Elastic Stack Logstash
1

Hello everyone,

I want to write a list of emails that are in the ES in a csv.

However the emails are inside a huge message.

The ES has a field named @request_logline and when they exist they are in the following format:

mail@mail.com

But this login tag is in a huge message.

Do you have any idea/suggestion on how I should approach this extraction?

2

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