On 10/01/2022 12:24, Graham J wrote:
> Martin Brown wrote:
>
> [snip]
>
>> It is annoying to find yourself with a blacklisted IP address where
>> all mail to major ISPs and mail providers is dropped on the floor.
>> These days they tend not to bounce to avoid backscatter of forged spam.
>
> This often happens with mobile internet connections that use CGNAT,
> because your public IP is shared with hundreds if not thousands of other
> users. The solution is to get a static IP, which is yours and yours
> alone. Then you are wholly responsible for all the traffic.
It doesn't bother me particularly but it does some of my not especially
computer savvy friends in micro businesses like horticulture. I no
longer have a fixed IP address but I used to in the good old days.
> If your traffic pattern is unacceptable to some providers, then find out
> why and resolve it.
It still seems to happen though an to internet non-cognescenti who I
don't think are ever likely to be doing anything that would attract
attention to them. They are just getting lumbered with a marked as bad
IP address from time to time when they drop the line and reconnect.
Line drops are quite common where I live and it is mostly micro
businesses that seem to suffer this fate (or rather notice if they do).
It doesn't help that some of them also have misconfigured SPF records
(set up by their ISP) for good measure. That also causes emails to be
dropped on the floor for hard/soft SPF fail sometimes without warning.
--
Regards,
Martin Brown