Web based email for elderly relatives - passkeys?

[StripedPillowcase]

My elderly relatives are changing their ISP (related to the copper/fibre landline issue, which I think (cross fingers) we've got sorted).

Their old ISP is a very legacy one, now completely unsuitable for non-techy consumers, their business is very much directed to the corporate market, and they have quoted huge monthly fees and a big one-off 'set-up' fee to change to fibre. Plus I wouldn't trust them with the relatives' landline after they mishandled a broadband outage last year.

I thought I had everything sorted, and had set them up a new outlook.com email address, with my own email address as a back-up if they forget the password. I wanted to add their mobile number for sending a 2-factor code for logging in, but outlook no longer use mobile numbers for this - you can't add one to the account.

You can log in to outlook.com with your password, but it's non-intuitive - the default is a code sent to my email address.

I've never set up passkeys on my own accounts - can anyone recommend this for elderly relatives - does using a passkey make life easier?

Or any recommendations for web based email that your relatives use and find easy to navigate, would be helpful?

Many thanks!

Are they accessing through a computer? Or a phone?

Yes, passkeys make it a lot easier - eg. on my laptop I just log into my email with a fingerprint (mac) or on my phone it just magically works.

BUT, it is tied to a device - I spent ages trying to get into one account, only to realise that I'd set up the passkey on my laptop, not my desktop and that's why I was struggling.

It's access through a laptop - they can't cope with a smart phone or tablet

Bump?

Aunt uses gmx.com and AFAIK they don't ask for a passkey. She's a very low user though.
I don't know if the following do or not but you could have a look:
mail.google.com
mail.yahoo.com
proton.me/mail