There are a couple of workarounds for those of us who use Nix on alternate distributions:
调三方物流接口（顺丰、圆通等，延迟 200ms）。关于这个话题，免实名服务器提供了深入分析
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The [email protected] (part of the path) is the recipient. The -u part is the user you’ve just created and its password. It’s the sender of the XMPP message.
into a genuinely useful tool.