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After attempting to install quickly with:

sudo apt-get install quickly python-quickly-widgets

I got a postfix (mail daemon) configuration screen. Why do I need it to use quickly and how should I configure it? I read/write mail on my browser (gmail...).

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up vote 0 down vote accepted

Postfix is a mail transfer agent, it's used to send email from within your computer system (email is inherently built into every unix-like operating system). This is sometimes used to record notifications for system administrators (i.e. an email to the 'root' user account) and things like that.

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In short, you can safely select No Configuration. You absolutely don't need to worry about it.

The reason why postfix was configured was that bsd-mailx depends on it, which in turn is a dependency of devscripts, which is installed as part of the debian build system.

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