Need to check and get email in comment body

[AldoCauchiSavona]

Is it possible in an automation rule to know if a JIRA user comments on a ticket and starts the comment with the email of a person? 

And if condition is true, that email is retreived?

I have test rule with a Trigger of Issue Commented and as an action I create a Variable with this smart value {{issue.comments.last.body starts with "([a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+)"}}.

I tried doing  JQL condition with a JQL of key="{{triggerIssue.key}}" AND comment ~ "@" to ensure that the comment has an email in it, but i am told that

• the issue didn't match the specified JQL (most likely)
• the chosen rule actor doesn't have permissions (or issue security level permissions) to view the issue
• the issue was deleted or wasn't indexed by Jira yet (in rare circumstances)

[AldoCauchiSavona · Accepted solution]

{{issue.comments.last.body.substringBefore("\n")}} get the first line in a comment

[AldoCauchiSavona]

I tested and managed to get the email if it is the first line on a comment with 

I am now validating with this advanced condition, but even if the first line is text, it still passes. The condition is as follows

Maybe my regex is incorrect?