Enable writting to log in ZNC:
 /query *status SetBuffer <#chan> [linecount] 
to see how it is:
/query *status listchans
<*status> +---------------+--------+-----------+--------+-------+--------------+-------+---+---+---+---+---+---+
<*status> | Name          | Status | In config | Buffer | Clear | Modes        | Users | ! | ~ | & | @ | % | + |
<*status> +---------------+--------+-----------+--------+-------+--------------+-------+---+---+---+---+---+---+
<*status> | #thunix       | Joined | yes       | *50    | *yes  | +:nrt        | 31    | 0 | 1 | 0 | 0 | 0 | 0 |
<*status> +---------------+--------+-----------+--------+-------+--------------+-------+---+---+---+---+---+---+
PHP sysinfo script

Local recipient table and how Postfix deals with different classes of addresses
Becoming a Postfix mirror site
Configure SPF and DKIM With Postfix
A howto for pre-DATA spam control.
postscreen spam control HOWTO

SPF-aware greylisting and filter-greylist

IRC clients and system info scripts available to use in Thunix:
Irssi Sysinfo
Weechat Sysinfo

Server status: temperature
Core 0 : 40 C
Core 1 : 40 C
Core 2 : 44 C
Core 3 : 44 C

Linux 4.15.0-62-generic x86_64
00:58:11 up 83 days, 21 min, 46 users, load average: 0.56, 0.52, 0.54