In reality, this string combines two distinct concepts: and a DNS TXT record lookup for Hotmail (now Outlook.com) .
If you’ve recently typed "-hotmail.com txt" into a search engine or stumbled upon it in a technical forum, you might be confused. Is it a hacking trick? A search filter? An email setting? -hotmail.com txt
Stay secure, and always verify email authentication records before trusting a sender. In reality, this string combines two distinct concepts:
Here’s what you need to know. In Google, Bing, or other search engines, the minus sign ( - ) acts as an exclusion operator . So a search for -hotmail.com txt would theoretically return results about "txt" files or "txt" records that are not related to Hotmail. A search filter
If you search for "hotmail.com" txt (without the minus), you are essentially looking for the records that tell receiving mail servers whether an email claiming to come from Hotmail is legitimate. What does hotmail.com TXT record contain? As of 2025, running a TXT lookup on hotmail.com returns something like: