Neutral, in your case, probably means that there is not enough volume coming from your server, and as far as I know the reputation of your /32 does not depend o

Neutral, in your case, probably means that there is not enough volume coming from your server, and as far as I know the reputation of your /32 does not depend on your block (of course, providers may still decide to filter your block). Did you set up the PTR record and SMTP banner?