We are a small ESP, and also doing our own promotional emailing. Our daily volume is about 600k.
Currently we are looking to build a new infrastructure for long-term growth. And I have few questions regarding IPs:
1. If we use only 10ips what is the risk of ISP/Spamhouse blocking whole /24, because some other customer of our hosting provider did something wrong?
We were recommended to to buy whole /24 just for this reason, even though we are not going to utilize them.
Can someone shed light on how ip blocks are being blocked/blacklisted?
2. It's inevitable that here and there we will get some complaints to IP address. How to go about finding mail friendly host?
3. Will colocation be a better option then getting a dedi? Why?
I'll be grateful for any input. James.