A lot of these list maintainers put a lot of work into not breaking things, but their are just too many websites out their to know if a block breaks one of them or not. Send the list maintainer an email - or if they are on Github/Gitlab open a ticket and have a discussion. I think you'll find many of them are happy to remove breaking domains. Of course whitelist is always an option too if the list maintainer disagrees with the removal of a domain.
I spoke directly with the pihole maintainers. They took a Hardline position that them blocking email from my city was the right thing to do because it used click tracking or some other metric gathering and was deemed a privacy risk.
I understand the devotion to a cause but it was too myopic for me.
As far as I know, the pi-hole maintainers do not maintain any of the default block lists. I maintain a list [1] that is then feed into the popular host list by Steven Black [2] - which is a default list.
I definitely do not want to break things for people and I'm happy to remove any reasonable domains from the list. I wouldn't consider google analytics a reasonable one to remove - but you get the idea. I hate to hear you had a bad experience of it. If my list had the breaking domains for you, I would of loved to have a ticket opened where we could discuss it. Sometimes it isn't clear cut between ads & tracking and useful services.
As commented below, we don't actually maintain any of the lists, so that wasn't us you spoke to!
You can configure the lists that you use to suit your needs. You can also whitelist any domains that you need. It's up to you what you ultimately block!
Hmmm, not sure I recall. Mind linking back to the conversation? Point is, we don't choose what domains are blocked or not, so there is nothing we can do except ship with a default whitelist. But we're not going to do that either, if we were to start doing that... what's to say we wouldn't whitelist something more nefarious.
It's safest for us, and our reputation, to stay out of the finer points of the actual blocked/not domains and instead defer to individual list maintainers who make that their business.
That post is 2 years old, and the op understood and was ok with the outcome...
Oobe is either
1)leave suggested defaults as is
2)don't use those lists.
Option 2 is available in the installer before you're even up and running. There is only so much hand holding we can do, to be fair. We have an extensive support community, and plenty of documentation, and yes, whilst I agree some users may fall between the cracks, the majority are able to find a solution to their problems.
There is no doubt that pihole works for some people. I'm just giving my honest review: it didn't work for me. It blocked too much. I asked for guidance and got a lecture about privacy.
And I did find a solution, just not with you product :)
Also, there is a popular whitelist project for the Pi-Hole that can make it more user friendly: https://github.com/anudeepND/whitelist