Group Parameters store information per group or topic (see TopicMode). You can edit them via `G p’ or better via `G c’, or you can set them yourself in your init file.
For beginners, I suggest to use `G c’ to specify group parameters. These are stored in your ~/.newsrc.eld file, together with lots of other information. In order to keep group parameters with the rest of your Gnus configuration, I suggest you put them into your ~/.gnus file.
Here are the variables to set:
You can read about the effects of each parameter in the Gnus manual node “Group Parameters”.
Here is a simple example for setting up mailing lists:
(setq gnus-parameter-to-list-alist '(("mail.emacs.bbdb" . "email@example.com") ("mail.emacs.bidi" . "firstname.lastname@example.org") ("mail.emacs.devel" . "email@example.com")))
And here is how to specify which mailing lists should act just like newsgroups – articles just expire, whether I read them or not.
(setq gnus-total-expirable-newsgroups (regexp-opt '("mail.emacs.devel" "mail.emacs.sent" "mail.news.sent" "mail.xemacs.design" "mail.frieden.jetzt" "mail.spam.duplicates" "mail.spam.filtered" "mail.baeckeranlage")))