Write a Python 3 script that is meant to be run in cron. It reads lines from a txt, each line contains an IPv4 or IPv6 address and port, it tries to connect, if it is unreachable, prints the error message.
<kbd>CMD</kbd> + <kbd>Shift</kbd> + <kbd>D</kbd> is the keyboard shortcut in macOS's Mail.app to send an email. It is also the keyboard shortcut in Planet's Writer to send a post. So, if you're used to that shortcut in Mail, you can apply it in Planet, too.
It works, but it takes a minute to wake the machine via Bonjour.
这件事情的最大的问题是心理预期，如果持续的心理预期就是这件事情有可能 not working，那就是问题。
it works sometimes, but not always, so an outbox that can work offline is still meaningful.
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