One ISP, many mailhosts

[Gingko]

Hello.

I just realised that I have a problem with my mailhosts registering.
Among multiple email addresses that I have, some of them are hosted by the SFR French ISP.
Of course, I made mailhost registration for all of them.
But this ISP has many mailhosts.
Among all of them, there are the following already registered by SpamCop:

msfrf2102.sfr.fr
msfrf2103.sfr.fr
msfrf2119.sfr.fr
msfrf2121.sfr.fr
msfrf2123.sfr.fr
msfrf2201.sfr.fr
msfrf2203.sfr.fr
msfrf2204.sfr.fr
msfrf2209.sfr.fr
msfrf2211.sfr.fr
msfrf2214.sfr.fr
msfrf2224.sfr.fr
msfrf2302.sfr.fr
msfrf2304.sfr.fr
msfrf2319.sfr.fr
msfrf2401.sfr.fr
msfrf2417.sfr.fr
msfrf2503.sfr.fr
msfrf2506.sfr.fr
msfrf2602.sfr.fr
msfrf2605.sfr.fr
msfrf2606.sfr.fr
msfrf2608.sfr.fr
msfrf2609.sfr.fr
msfrf2611.sfr.fr
msfrf2614.sfr.fr
msfrf2618.sfr.fr
msfrf2619.sfr.fr
msfrf2621.sfr.fr
msfrf2622.sfr.fr
msfrf2625.sfr.fr
msfrf2626.sfr.fr
msfrf2627.sfr.fr
msfrf2628.sfr.fr
msfrf2629.sfr.fr
msfrf2631.sfr.fr
msfrf2633.sfr.fr
msfrf2634.sfr.fr
msfrf2635.sfr.fr
msfrf2636.sfr.fr
msfrf2637.sfr.fr
msfrf2639.sfr.fr
msfrf2641.sfr.fr

That is, 43 different mailhosts.
With many holes in their numbering, suggesting that many of them are still missing.
I just received a spam on one of these addresses telling there is a mailhost problem.
The mailhost used was msfrf2612.sfr.fr.
Not in the above list.

If I try registering this mailhost again, the “[SpamCop] account configuration email” seems to travel randomly through only one of them.
This means that I'd have to try to register this ISP maybe 50 times (or more) before having only a 50% probability to add msfrf2612.sfr.fr to this list.

[petzl]

7 hours ago, Gingko said:

That is, 43 different mailhosts.
With many holes in their numbering, suggesting that many of them are still missing.
I just received a spam on one of these addresses telling there is a mailhost problem.
The mailhost used was msfrf2612.sfr.fr.
Not in the above list.

this is normal my SpamCop one list ALL the mailhosts in CISCO as example, must be hundreds!
Never had spam from one though.
OVH have mailhosts  worldwide!
Tick the box below parse box where you past your spam
Show technical details 
Then you gee more information.