question about return code .255

["Dimitris T." <dimitris@xxxxxxxxxxxxx>]

hey,

using dnswl in postscreen configuration, with local non-forwarding bind 
resolver :

        list.dnswl.org=127.[0..255].[0..255].0*-2
        list.dnswl.org=127.[0..255].[0..255].1*-3
        list.dnswl.org=127.[0..255].[0..255].[2..254]*-4

but getting a lot of 127.0.0.255 return codes from dnswl queries...  
according to https://www.dnswl.org/?page_id=15#returncodes , this is a 
special return code in case of >100k (per 24h) issued requests..

struggling with this , because all (4) MXs combined, roughly receive ~2k 
emails per 24h.

looking at latest mail + queries logs from our resolver, and this number 
is never surpassed. example from "busiest" MX :

➜  ~ cat /var/log/mail.log.1 |  grep dnswl | wc -l
827

➜  ~ cat /var/log/mail.log.1 |  grep dnswl | grep 127.0.0.255 | wc -l
767

➜  ~ cat /var/log/named/queries.log.1 | grep dnswl | wc -l
1929

so, could there be another reason for this?


thx,

d.