gnus-summary-article-expire-hook

gnus-summary-article-expire-hook is a variable defined in `gnus-sum.el'.
Its value is

nil

• This variable may be risky if used as a file-local variable.

Documentation:
*A hook called after an article is expired.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.