>De'vID de.vid.jonpin at gmail.com
>Wed Jan 5 23:54:29 PST 2022
>> The only possibility I can think of is my Firefox browser, which I use >so
>> I can have Greasemonkey (a word-filtering add-on) when I browse >webpages.
>
>
>I don't think your browser can affect whether other people's systems
>identify your email as spam. Far more likely that it's your ISP or domain
>name (yahoo.com).

It *could* be my ISP. I don't remember the details of my computer service, but my ISP rotates and changes quite a lot from day to day. When I edit Wikipedia logged out, my edits are never from the same ISP twice.