Does SearchBlox support sitemap.xml during the crawling of websites?

To index a website's sitemap, you must activate sitemaps in the Collection settings. Here are the steps to follow:
1. Navigate to the Admin console and select the Collection name for the Web Collection.
2. Click on the Settings tab.
3. Scroll down to the Scanner settings.
4. Select the Yes option in the Follow Sitemaps field.

To learn about sitemaps in Web Collection, read: Using Sitemaps in HTTP Collection