comcast/xfinity emails stopped working on my iphone. (map.comcast.net doesn't support password authentication)

This is extracted from Xfinity web site.

"Turn Your Access to Third Party Email Programs On/Off in Xfinity Email

To provide our customers with additional security, we added a new checkbox to the Xfinity Email website. This may affect your ability to manage your Xfinity Email (Comcast.net) through third-party programs like Outlook, Google, Apple Mail, Thunderbird and more.

These programs could expose your Xfinity ID and password to fraud and other risks, including the potential for external programs to read, download and delete emails on your behalf.

If you currently use a third-party program to read your email, the security setting is checked by default. If you don’t currently use a third-party program, the setting is unchecked and you won’t have access to these programs. You can easily change this setting at any time by checking the box and turning on access. Here’s how.

How To Update Email Security Settings

1. Sign in to Xfinity Email using your Xfinity ID and password.
2. In the top-right corner, click the Gear icon, then select Settings.
3. Click Security.
4. Uncheck the box under Third Party Access Security to prevent third-party programs access to your Xfinity Email, or check the box to allow access.

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Turn Your Access to Third Party Email Programs On/Off in ...