Cannot connect to server. (Unable to connect)

1

I can’t get K-9 Mail to work with either of my email accounts, neither iCloud nor Gmail.

I have followed Apple’s instructions here:

This identical configuration for iCloud works for me in Thunderbird, but not K-9.
Depending on whether I select SSL/TLS or STARTTLS in K-9, I receive either the titular message or “Setup could not finish Username or password incorrect. (unmatch quote)”.

For my Gmail, a similar message. “Setup could not finish Username or password incorrect. (invalid credentials (Failure))”

2

For adding a Gmail account, see How do I add a Gmail account? and maybe How do I add a Google Workspace account?

3

Thanks, I was able to get my Gmail working, but my iCloud email still eludes me.

4

Any ideas? No combination of settings works.

5

The iCloud Mail documentation states that you need to generate an app-specific password. Did you do that? Are you using the app-specific password with K-9 Mail?