Mail2: disable greylisting by default

[stephdl]

We want to implement a checkbox to enable/disable greylisting in the filter tab

see my PR NethServer/nethserver-mail#35

[nethbot]

in 7.4.1708/testing:

• nethserver-mail2-ipaccess-2.0.0-1.19.g7880290.ns7.noarch.rpm
• nethserver-mail2-getmail-2.0.0-1.19.g7880290.ns7.noarch.rpm
• nethserver-mail2-filter-2.0.0-1.19.g7880290.ns7.noarch.rpm
• nethserver-mail2-p3scan-2.0.0-1.19.g7880290.ns7.noarch.rpm
• nethserver-mail2-common-2.0.0-1.19.g7880290.ns7.noarch.rpm
• nethserver-mail2-server-2.0.0-1.19.g7880290.ns7.noarch.rpm

[nethbot]

in 7.4.1708/testing:

• nethserver-mail2-ipaccess-2.0.0-1.23.g592fbaf.ns7.noarch.rpm
• nethserver-mail2-p3scan-2.0.0-1.23.g592fbaf.ns7.noarch.rpm
• nethserver-mail2-getmail-2.0.0-1.23.g592fbaf.ns7.noarch.rpm
• nethserver-mail2-filter-2.0.0-1.23.g592fbaf.ns7.noarch.rpm
• nethserver-mail2-common-2.0.0-1.23.g592fbaf.ns7.noarch.rpm
• nethserver-mail2-disclaimer-2.0.0-1.23.g592fbaf.ns7.noarch.rpm
• nethserver-mail2-server-2.0.0-1.23.g592fbaf.ns7.noarch.rpm

[nethbot]

in 7.4.1708/testing:

• nethserver-mail2-server-2.0.0-1.24.g8ad7dad.ns7.noarch.rpm
• nethserver-mail2-p3scan-2.0.0-1.24.g8ad7dad.ns7.noarch.rpm
• nethserver-mail2-common-2.0.0-1.24.g8ad7dad.ns7.noarch.rpm
• nethserver-mail2-ipaccess-2.0.0-1.24.g8ad7dad.ns7.noarch.rpm
• nethserver-mail2-getmail-2.0.0-1.24.g8ad7dad.ns7.noarch.rpm
• nethserver-mail2-filter-2.0.0-1.24.g8ad7dad.ns7.noarch.rpm
• nethserver-mail2-disclaimer-2.0.0-1.24.g8ad7dad.ns7.noarch.rpm

[nethbot]

in 7.4.1708/testing:

• nethserver-mail2-filter-2.0.0-1.26.g0547d0c.ns7.noarch.rpm
• nethserver-mail2-disclaimer-2.0.0-1.26.g0547d0c.ns7.noarch.rpm
• nethserver-mail2-ipaccess-2.0.0-1.26.g0547d0c.ns7.noarch.rpm
• nethserver-mail2-server-2.0.0-1.26.g0547d0c.ns7.noarch.rpm
• nethserver-mail2-p3scan-2.0.0-1.26.g0547d0c.ns7.noarch.rpm
• nethserver-mail2-getmail-2.0.0-1.26.g0547d0c.ns7.noarch.rpm
• nethserver-mail2-common-2.0.0-1.26.g0547d0c.ns7.noarch.rpm

[DavidePrincipi]

Test case

Check the greylist cursor switches the feature to a "disabled" state, by moving it to the left edge

In this state rspamd must not greylist any message

[gsanchietti]

Greylisting is disabled by default:

[root@test ~]# journalctl -u rspamd | grep greylist
Apr 13 15:11:28 test.local.neth.eu rspamd[2104]: <d86igq>; cfg; rspamd_config_is_module_enabled: lua module greylist is disabled in the configuration

After setting threshold to 4:

Apr 13 15:16:47 test.local.neth.eu rspamd[2104]: <rdj4ue>; cfg; rspamd_init_lua_filters: init lua module greylist