3 ms·

this is because when an IP is blacklisted it's generally done in a contiguous block (subnet) that are probably shared by hosts on the same virtual lan (vlan).

this is because when an IP is blacklisted it's generally done in a contiguous block (subnet) that are probably shared by hosts on the same virtual lan (vlan). this is to prevent mailers from jumping to another ip on the same subnet. trunking an additional vlan into their virtual pool just for you would have constituted a major production change in probably 2 or 3 core switch layers. the operational risk and expenditure for this kind of change easily goes into the thousands of dollars, possibly tens of thousands if they screw something up. what exactly is "any amount of money" to you? because to them and other service providers, it means tens of thousands of dollars, not another 50 bucks.

zaius 14y ago
Interesting to know. I know nothing about the admin side of datacenters. It was a whole subnet that was blacklisted. That said, they offered me a new IP from a couple different subnets as replacement, so I don't think it was too hard for them to do it. They would let me have an extra IP, but wouldn't let me run the two IPs concurrently for more than 24 hours. This was especially frustrating since the subnet was blacklisted due to linode using generic PTR records by default. I needed a solution that didn't eat into my vacation time, so I ended up setting up a second server in the same datacenter and making it forward connections. That effectively got me a new IP for $20. Just to be clear, I'm not complaining about it. I think they handled it fine. But I wouldn't hold them as some bastion of support perfection.
- beachstartup 14y ago
  those other vlans/subnets were probably already on the switches and may have been used for extra capacity, security separation, or even something like internal backup use you got lucky though, most of the time the entire network of shared hosting providers is blacklisted from sending mail. they may have just rolled out a brand new subnet or something

zaius 14y ago

Interesting to know. I know nothing about the admin side of datacenters. It was a whole subnet that was blacklisted. That said, they offered me a new IP from a couple different subnets as replacement, so I don't think it was too hard for them to do it. They would let me have an extra IP, but wouldn't let me run the two IPs concurrently for more than 24 hours. This was especially frustrating since the subnet was blacklisted due to linode using generic PTR records by default. I needed a solution that didn't eat into my vacation time, so I ended up setting up a second server in the same datacenter and making it forward connections. That effectively got me a new IP for $20. Just to be clear, I'm not complaining about it. I think they handled it fine. But I wouldn't hold them as some bastion of support perfection.

beachstartup 14y ago
those other vlans/subnets were probably already on the switches and may have been used for extra capacity, security separation, or even something like internal backup use you got lucky though, most of the time the entire network of shared hosting providers is blacklisted from sending mail. they may have just rolled out a brand new subnet or something