> I guess it would be easier to build up a decent IP reputation if it was on a "virgin" IPv6 address used only for this purpose, and not tainted by prior use etc.
IP addresses (especially IPv6) are ephemeral, email providers know that. Just about every email service has a TTL on IP reputation.
Usually, if an email is DKIM signed (and aligned) then domain reputation is used as the key indicator, the sender IP becomes less relevant in that situation.
Obviously, each implementation is different. There are no silver bullets here.
But what I'm trying to say here is: do not worry about inheriting a 'tainted' IP address. With the limited number of IPv4 addresses available, and the huge volume of spam, just about every publicly available IP would have been 'tainted' by now.
IP addresses (especially IPv6) are ephemeral, email providers know that. Just about every email service has a TTL on IP reputation.
Usually, if an email is DKIM signed (and aligned) then domain reputation is used as the key indicator, the sender IP becomes less relevant in that situation.
Obviously, each implementation is different. There are no silver bullets here.
But what I'm trying to say here is: do not worry about inheriting a 'tainted' IP address. With the limited number of IPv4 addresses available, and the huge volume of spam, just about every publicly available IP would have been 'tainted' by now.