Mail delivery denied by Microsoft using Spamhaus, also if the IP is not listed

This answer is so ridiculosly stupid, it seems like you don't understand the problem at all.
It is Microsoft that is blocking OP's IP address not his ISP.
Best way to mitigate this problem is to advise customers not to use live.com, hotmail.com and outlook.com mail adresses.
I have the same problem for years and can not solve is since the outlook-delivery-team is very useless.

Vom Outlook.com Deliverability Support kam nun die Antwort (in einer Mail, auf die nicht geantwortet werden soll):

"[Auflistung von IP-Adressen]

Note: Errors are unlikely, however, if an error is indicated, please resubmit the specific IP or IP range."

Was soll mir das jetzt sagen?

If the file is not present in the “Preferences” folder within the “Library” folder, it could mean that Microsoft Word has not been installed or used on your computer. Alternatively, the file may have been deleted or moved.

You could try searching for the file using Spotlight by pressing “Command + Space” and typing “com.microsoft.Word.plist” in the search bar. If the file is still not found, you can try updating office or uninstall and reinstall Word from here

https://learn.microsoft.com/officeupdates/update-history-office-for-mac

Opening and customizing the ribbon works perfectly and I am able to open the different tabs with the different commands. The only problem is that the lasso tool is now missing, despite being there once. I already searched through the customize tab for
the ribbon to find the lasso command, but it is not listet or at least I don't find it. Even if i did something wrong with editing several tabs in word, the lasso tool should still be listed in the customize window within all commands, but it is not there.
Under what specific command name is the lasso tool normally listed?

I suspect this is related to MS Office Outlook and not outlook.com (browser based) where you posted this. If I am correct please either repost this in the MS Office category for the version you have by using the category tab at the top of
the page, or move this thread there.