The sm-archive.conf configuration file is specified by this partial bnf description.
CONFIG = {ENV-FROM ENV-TO}+
ENV-FROM = env_from "{" LIST "}" ";"
ENV-TO = rcpt_to "{" LIST "}" ";"
LIST = ELEMENT {LIST}+
ELEMENT = ADDRESS TARGET ["remove"] ";"
ADDRESS = (USER@ | DOMAIN | USER@DOMAIN)
TARGET = ("" | USER@DOMAIN)