Tell HN: Fastmail is leaking internal routing email address/username with teams
Using throwaway...Fastmail is leaking the distribution mail address/username via the X-Resolved-to header.Now, normally this wouldn't be such a big problem, but when someone (needs to) forward(s) the original email as attachment, the internal email addresses are revealed, which is many cases is your Fastmail username. In my opinion this is a security / data leak. Fastmail's "fix" is to manually...