Hi Thomas,
A small technical point, maybe insignificant, but sitemap.xml code produced by "A1 Sitemap Generator v9.1.0 Pro" begins with these 2 lines:

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">


I suggest that you might now update those URL references to SSL secured https://

Regards,
Gary, IT ZAP Website Design Works.

Hi Gary,

Will think about it... Although the official examples still use http:// innstead of https:// for pointing-to the schemas ...

And checking some threads at Google forums from 2017, then GWT even reports it as an error...  (Add to that - sitemaps generated in A1SG has to work for a wider range of services consuming XML sitemaps which expect the namespace ID string to be using http://)

Reference

• https://productforums.google.com/forum/#!topic/webmasters/XKQj6WVLLMM
• https://www.sitemaps.org/protocol.html