I tried to add this:
* A very simple [https://forum.lazarus.freepascal.org/index.php/topic,20726.0.html loan calculator]
entry to the How-To Portal listing while editing the whole page and saving the page was prevented by the Spam filter suggesting the site was blacklisted.
Instead, I edited the General section of the page and it was saved without complaint.
As the page is a page of links to the Forum, are there now too many links causing on the page and this is causing the the spam filter to activate?