Still can't get Bing to index my websites that were indexed for years. Since Bing controls Yahoo's listings, my websites are not appearing in Yahoo as well.
Google, there are no issues whatsoever. Both my sites are indexed.
My Bing Webmaster Tools shows the following...
1. You are a verified administrator - Nothing has changed there
2. Security & Privacy >> Copyright Removal Notices - Nothing listed
3. robots.txt Tester - No issue there; Nothing is being blocked, just the basic code...
User-Agent: *
Disallow:
[Sitemap]
4. Blocked URL - I only blocked the cached for many of my site's URLs showing, "Error 404 Not Found"
5. Site Scan shows: Pages Scanned: 1000; Errors: 561; Warnings: 652 - I have been working on this but don't see how my entire website was deindexed for... Meta Description tag missing, Blocked by robots.txt [not the case], Meta robots tag contains restrictive robots directives, Alt attribute for images is missing, Html size is too long, Title too long, Meta Description too long or too short, Title too short, More than one h1 tag, and H1 tag missing.
6. Sitemaps: I corrected/updated my sitemaps weeks ago; All is good
7. Site Explorer - Showing malware for the domain and every URL on my websites.
All my URLs show the following... Discovered but not crawled: The inspected URL is known to Bing but has some issues which are preventing indexation. We recommend you to follow Bing Webmaster Guidelines to increase your chances of indexation. If you think this URL should be indexed, click on Request indexing button. We will index it if we can fetch it and it adheres to Bing Webmaster guidelines. [I clicked the Request Indexing button and still no index]
Other URL issues appear in Site Explorer whereas I'm working on some of that but again I don't see how both my sites and all URLs are a problem to Bing and Yahoo.
Malware Scan at https://sitecheck.sucuri.net/: Domain and other URLs show 'No Malware Found & No Site is not Blacklisted' [Bing shows malware for all my URLs]. Google Search Console shows no malware at all. So I take this as all external backlinks pointing to websites and posts/pages have no malware either.
I have contacted Bing support repeatedly with no response from them. I recall having a similar issue with Bing years ago. They responded quickly and resolved the issue which wasn't my website. Something triggered an alarm on their end. Once they reset things on their end, my website got indexed again.
If anyone has a solution or path to correcting the issue, my ears are open. But I don't think the issue has to do with my websites. I'm leaning more towards the issue being on Bing's side.