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I'd like fail2ban to send me alert emails for any events. There seem to be dest variables littered throughout the config files in /etc/fail2ban and /etc/fail2ban/action.d

Is there a way to set one destination email for all events? I can't seem to find up to date documentation on this.

jail.local contains:

# ban & send an e-mail with whois report to the destemail.
action_mw = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
            %(mta)s-whois[name=%(__name__)s, dest="%(destemail)s", protocol="%(protocol)s", chain="%(chain)s"]

But where is destemail set? It would also be useful to know how to quickly test that the destemail is working.

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Looks like it is in /etc/fail2ban/jail.local (on centos 6.7) which has been copied from jail.conf.

A one liner to test that mail deilvery is working would be

echo "My message" | mail -s subject your@email.co.uk

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