gnus-registry-ignored-groups

gnus-registry-ignored-groups is a variable defined in `gnus.el'.
Its value is

(("delayed$" t) ("drafts$" t) ("queue$" t) ("INBOX$" t) ("^nnmairix:" t) ("^nnir:" t) ("archive" t))


Documentation:
*Groups in which the registry should be turned off.

You can customize this variable.