Sending emails for outages would be a lot of work as Sonos would need to know every service you are subscribed to and then only send the outage mail if you were impacted.

They would also need to build an opt-out process so folks not wanting the emails could be removed from the list. Probably on a per-service basis, I know I don't care about the batch of services I'm signed up for but rarely use, only Amazon, even then I'd likely pass on the email as I'd not see it from my controller device and powering up the desktop to look at mail is a pain.

Much easier to just click the Sonos Service Status page and look at the service you are having issues with.

https://status.sonos.com/

When the Sonos search failed last night in the Sonos App, I was prompted with a “something went wrong” and a directed to a status page in the App, ie the status page is built into the App. I suspect the search issue was related to the Sonos Radio outage. It was only search that was not working for me, I don't use Sonos Radio, and was resolved quite quickly.

I have seen in-app notifications when a particular issue has hit a music service, which I find much more beneficial than receiving an email.

If I am having an issue with a specific music service, I would definitely check the Sonos Status page, before doing too much troubleshooting, although it can take some time before any issue is confirmed and verified on the status page.

First checking the community here or other Sonos forums usually quickly identifies others having an issue with the same music service.

Sonos is a large enough corporation to determine which devices, systems, etc, we have. I listen solely through my computer. They have had all my necessary information for years and they can certainly send me an email advising me of any system issues they have. Sorry, but it is a matter of courtesy.

I would be extraordinarily unhappy with Sonos if they were to do this. Different strokes for different folks, I guess. 

Anyone have an email address for Sonos customer service?

Me too. If there was no opt out option, I’d have my SPAM folder block the emails.

Look at the Contacts page, if it isn't there it isn't supported. 

Here is the response from a Sonos chat person: 

I can’t find any information about contacting customer support by email.

So next time this happens I will switch systems. Last time I tried customer service via phone on another issue Icouldn't understand what was being said. It’s like getting a sharp stick in your eye:)

The support email address only accepts emails when you have an open support case.

You can contact Sonos either through Chat or by telephone.

https://status.sonos.com is a thing. No need for email notifications.

A “thing” is obvious. 
A Ouija Board would have been a better choice for me. 
That’s a thing too LOL!

Anytime I have a problem with a service, I bring up a browser and go to the status page above.  Easy peazy, no inordinate amount of time spent, and certainly faster than searching through my emails.

YMMV.