[_remote_ip] not working

Where can we see the website in question?

https://www.xmfg.com

Update the plugin first. The current version is 5.3.

I don’t think I can update because I am running on PHP 5.3. I am unable to upgrade PHP version on the server, I have asked and they will not upgrade.

I updated WP to v5.1.8 as that’s the last version that supports PHP 5.3. What version of CF7 should I update based on PHP support?

See Setting up mail

What email settings do you have in the Mail tab panel?

<p><b>Visitor Information</b><br>
[_remote_ip]<br>
[_user_agent]
</p>

As far as settings go, it’s the same I use on all 20 sites I am running. The one w PHP 7, I am able to get it to work but on the older WP version, CF7 and PHP, I can’t.