My username references one of my favorite literary characters, the gentleman with the thistledown hair from Jonathan Strange and Mr. Norrell.
My avatar is a goblin with long, scraggly hair who looks upward timidly with voluminous eyes.
If an alias receives spam, I can deactivate it. Future mail addressed to that alias will not forward to my email inbox. In essence, stop the flow of water instead of repeatedly mopping around the leak. Also, I am wary of malicious unsubscribe links.
I use Tuta mail. It is entirely open source. There are both paid and free tiers. I started on a paid tier, then downgraded to free. I like the option of a usable free tier when money is tight. I use addy.io for aliases.
This makes me love F-Droid even more!