There are different versions of Outlook depending on your subscription. Companies that do things properly, never see the problematic, "free version" of Outlook. They have very fine control over the features and data collections they enable.
Lichtblitz
Weird, I've never had problems over the past 15 years or so and I've been using VPS servers exclusively. Maybe my providers were reputable enough.
I realize my evidence is only anecdotal, but that's why I started "in my experience". Also, common blacklists are checked by the services I mentioned.
The Lenovo business models (ThinkPad series) are amazing value. My 11 year old laptop is still going strong.
Just stay far away from any Lenovo non-business models.
In my experience, this is nothing more than an urban legend at this point. There are great standards, like DMARC, DKIM, SPF, proper reverse DNS and more, that are much more reliable and are actually used by major mail servers. Pick a free service that scans the publicly visible parts of your email server and one that accepts an email that you send to them and generates a report. Make sure all checks are green. After an initial day of two of getting it right, I've never had trouble with any provider accepting mail and the ongoing maintenance is very low.
Milage may vary with an unknown domain and large email volumes or suspicious contents, though.
Exactly this. This procedure is so common that you need to take care in situations where you don't want the headers, as some tools set them per default.
Flatpak with Fedora 39 must have come a long way. Almost every tutorial with workarounds or discussion of broken features you can find online is now obsolete. It just works out of the box, especially under KDE. Mostly. That makes searching for actual issues extremely hard because I find myself chasing down paths of issues that have long been resolved.