this is the GSE platform :)
$ curl -I http:
Note that google web runs on a different platform, gws (google web server?)
it could be Google's servlet engine (OpenGSE) or something completely different.
the mail data itself (and not just the Internet) also has the same header (as intercepted in the browser)
however, it is still the web interface, I did not check the SMTP servers, if you were wondering what
the question "which javascript engine works?" remains open (if that even makes sense)
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