Re:Gmail, We Need to Talk
by dredmorbius on Wednesday November 11, 2015 @12:29AM
(#10544980)
You cannot guarantee squat. Which is pretty much the gist of TFA, within a single vendor's various client interfaces to its own unified email system.
However, as I put on my True Scotsman hat and kilt, any true email client will present monospaced fonts, therefor those which fail to do so aren't real email tools.
It also looks ugly.