My ISP might get blacklisted

The last of seven in our occasional series on why ESPs need, or don’t need, lots of IP addresses to send mail properly.

I need multiple IP addresses in different locations so as to provide redundancy against blacklisting of my ISP

Why this is right
If you think that your email is likely to be blocked due to the reputation of your ISP then having a backup ISP makes some operational sense.
Why this is wrong
It’s just very, very wrong. Why are you, an email sending company, buying service from an ISP you expect to be blacklisted? ARE YOU NUTS? Regardless of how cheap the deal an ISP is offering you, if you think that their reputation is bad enough that you need to do your network engineering around the possibility that they’ll be blacklisted, DON’T BUY SERVICE FROM THEM!

Godzill Facepalm
Don't do this, or you'll make Godzilla facepalm

Related Posts

Why do you need so many IP addresses (part 2)?

In my last post I discussed the background as to why an ISP will require their users to use their IP address allocation efficiently. I also mentioned in passing that I’d discussed ESP address allocation with both ESPs and ISPs recently.
The ESP was talking about assigning a couple of dozen IP addresses to each customer, because they might be useful for spreading load and it would provide some flexibility for moving from one IP address to another if one should get blocked. And IP addresses are pretty much free. They were wrong.
The ISP was considering an application for 750 IP addresses from a new ESP customer. They assumed that there was no possible reason other than snowshoe spam for an email related customer to need that many IP addresses. While I suspect they may have been right about the specific potential customer, the general assumption was wrong.
I’ve seen a lot of reasons given by ESPs for why they need so many IP addresses:

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I need IP addresses to handle the volume

Number two of seven in our occasional series on why ESPs need, or don’t need, lots of IP addresses to send mail properly.

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I need to deliver my mail fast

Number four of seven in our occasional series on why ESPs need, or don’t need, lots of IP addresses to send mail properly.

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