The wild idea of mining cryptocurrency with your electrical car

Cryptocurrencies are as trendy as electrical cars. It should not come as a surprise that people now think about the possibility to use the car to mine cryptocurrency. It is mostly about abusing the electricity plan (for instance free plugs in Paris could do), but what is quite funny (or sad, depending) is that now, we’re getting some self-righteous anti-diesel anti-piston engine crowd considering to contribute to one of the worth energetical waste of the period. More or less in 2017 the consumption of a country like Slovakia, just burned, not producing anything but unneccessary heat, just to make a logical proof that some transactions are legit.

So, yeah, cryptocurrencies are fun in principle. Yeah, surely we should expand electrical engine territory. Still, the idea that both could be promoted by the same crowd is kind of a joke. Can you be a so-called hard core environmentalist when you burn energy just because?

 

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Getting nginx’s wildcard-based server names to pass Exim HELO syntax checks

Many PHP-based apps, like webmails, when using SMTP functions, depends on nginx server_name value to set up the HELO sent.

But if your server_name value is wildcard-based, you’ll get “syntactically invalid argument(s)” from the SMTP server. Example with ownCloud.

Assuming that the SMTP running on the same host as your webmail is not accepting mail but from the webmail itself, you can easily work around this. You can addd

helo_allow_chars=^~

in, for example, /etc/exim4/conf.d/main/00_webmail, if your server name is something like ~^mx.