article_post_restrictions = permit_anyone $article_post_restrictions parameter controls who can post to this ML. To set this as "permit_anyone", anybody (including system special account e.g. root, postmaster) can post. By default, $article_post_restrictions is defined as follows for &fml4; compatibility, article_post_restrictions = reject_system_special_accounts permit_member_maps reject "reject_system_special_accounts" denies post if From: looks like system accounts e.g. root, postmaster. This configuration means that system special accounts cannot post and only user contained in $member_maps can post article. Attention that reject_XXX and permit_XXX statement is first match. Any persons in a domain can post always. It is not easy to handle global variables in the case of &fml4; . By using the following restriction, you can ermit only sender of example.co.jp domain and reject other domain. [/var/spool/ml/elena/config.cf] article_post_restrictions = reject_system_special_accounts permit_member_maps reject member_maps = pcre:$ml_home_dir/sender.pcre [$ml_home_dir/domains] \S+\@example.co.jp