Went to the replies to say this. You got here before me

12 days and 17 hours. As another commenter pointed out, checked with uptime

I actually thought optical microscopy worked just fine at this scale.

I know it’s not the case for this photo, but if a 7 μm red bloodcell is reflecting red light (700nm, aka 0.7μm) under a bright white light, wouldn’t the smallest discernable detail of the red blood cells be about a 10th of its width? Is that not roughly the detail we have in this image?

I’m making an assumption that the distance between discernable parts roughly parallels the wavelength’s width. I could be wrong tho

Fair mistake to make, they have a very similar colour scheme I can see. Happy to hear of yet another mail provider to consider, I want to hear about as many as possible; I want to make the right choice

As far as I can tell from posteo’s own FAQ site, they do not allow custom domains. I’d really consider swithcing to them otherwise. Do you use posteo?