*Looks. That’s not nice.*
https://plugins.trac.www.ads-software.com/browser/freshmail-newsletter/trunk/templates/google_url.php
Which is required in these files.
freshmail-newsletter/src/Plugin/Newsletter/Freshmail.php:350: require(WP_FRESHMAIL_DIR.'/templates/google_url.php');
freshmail-newsletter/src/Plugin/Newsletter/Freshmail.php:452: require(WP_FRESHMAIL_DIR.'/templates/google_url.php');
freshmail-newsletter/src/Plugin/Newsletter/Widget/FreshmailWidget.php:59: require(WP_FRESHMAIL_DIR.'/templates/google_url.php');
Yes, if you’re using the “pl_PL” locale then the plugin adds a link. That’s not cool. It’s hidden and only exists for search engine hits. Links like that are explicitly not allowed except with the user’s consent and need to default to “off”. See item #10 on this link.
https://www.ads-software.com/plugins/about/guidelines/
When you see this type of violation you can report it to the Plugins team via plugins [at] www.ads-software.com
but in this case please don’t. I have already sent all of the details to them.