Yes I actually missed having the "undo send" for longer time, I should have said: "Slack currently has a free tier available". 

Thanks for clarifying :)
Joel.

On Thu, Nov 15, 2018 at 1:41 AM Andrew Clayton <andrew@zeta.digital-domain.net> wrote:
On Sun, 11 Nov 2018 07:06:33 -0800
Joel Serrano <joel@textplus.com> wrote:

> Slack is free.

(to use) for now...

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