- LIST *references; /* message references (in reverse order) */
- LIST *in_reply_to; /* in-reply-to header content */
- LIST *userhdrs; /* user defined headers */
+ string_list_t *references; /* message references (in reverse order) */
+ string_list_t *in_reply_to; /* in-reply-to header content */
+ string_list_t *userhdrs; /* user defined headers */