Wondering if those emails are really from Apple:
Identify legitimate emails from the App Store or iTunes Store - Apple Support
Eg: says:
"Scammers often try to trick you into sharing personal or financial information by sending you messages or links to websites that might look like they’re from Apple, but their actual purpose is to steal your account information."
More info: Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support
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Re: Says server can’t be found? It doesn’t matter if I’m using my iPhone or iPad
Else: For links in legitimate emails from Apple:
See how to check Apple’s System Status page (a green dot shows feature is operating normally):
Apple - Support - System Status
and
You can troubleshoot:
If Safari isn't loading websites or quits on your iPhone, iPad, or iPod touch - Apple Support
Eg: says:
" If you're using a VPN (Virtual Private Network), check your VPN settings. If you have a VPN turned on, some apps or websites might block content from loading." (Much more in above article).