Seems to work in thunderbird. Thanks

I am ok with the mail-app.

You are right: Tested to drag an old mail in thunderbird from the old account to the new icloud-account and it worked! Also works in the apple-mail-app but i do not have a mac, so it is easier in thunderbird in my case.

1: Seems too late in my case. I yet edited the DNS-configuration so i do not have access to the old servers.

2: YES! This looks good! Will try this. THANKS

1. I did not see the + to import mails but this would not work either because the old mailservers do not work anymore.

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Perfect answer. Thank you.

What do i have to do to copy the mails from 2023? I (think I) have no access to the old mailserver but i have all the copies in my thunderbird.

I am a little bit disappointed. I have three accounts to separate different kind of work and private stuff. So I have to work with folders and rules?

Got it.

Just found it. Thank you. But there are is also only one account and only the mails that came in after i configured icloud+.