diff options
Diffstat (limited to 'krebs/3modules/exim-smarthost.nix')
| -rw-r--r-- | krebs/3modules/exim-smarthost.nix | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/krebs/3modules/exim-smarthost.nix b/krebs/3modules/exim-smarthost.nix index fe149448b..7c176d224 100644 --- a/krebs/3modules/exim-smarthost.nix +++ b/krebs/3modules/exim-smarthost.nix @@ -12,6 +12,8 @@ let api = { enable = mkEnableOption "krebs.exim-smarthost"; + enableSPFVerification = mkEnableOption "SPF verification"; + authenticators = mkOption { type = types.attrsOf types.str; default = {}; @@ -123,10 +125,12 @@ let # XXX We abuse local_domains to mean "domains, we're the gateway for". domainlist local_domains = ${concatStringsSep ":" cfg.local_domains} domainlist relay_to_domains = ${concatStringsSep ":" cfg.relay_to_domains} + domainlist sender_domains = ${concatStringsSep ":" cfg.sender_domains} hostlist relay_from_hosts = <;${concatStringsSep ";" cfg.relay_from_hosts} - acl_smtp_rcpt = acl_check_rcpt acl_smtp_data = acl_check_data + acl_smtp_mail = acl_check_mail + acl_smtp_rcpt = acl_check_rcpt never_users = root @@ -173,11 +177,46 @@ let acl_check_data: warn - sender_domains = ${concatStringsSep ":" cfg.sender_domains} + sender_domains = +sender_domains set acl_m_special_dom = $sender_address_domain accept + acl_check_mail: + ${if cfg.enableSPFVerification then indent /* exim */ '' + accept + authenticated = * + accept + hosts = +relay_from_hosts + deny + spf = fail : softfail + log_message = spf=$spf_result + message = SPF validation failed: \ + $sender_host_address is not allowed to send mail from \ + ''${if def:sender_address_domain\ + {$sender_address_domain}\ + {$sender_helo_name}} + deny + spf = permerror + log_message = spf=$spf_result + message = SPF validation failed: \ + syntax error in SPF record(s) for \ + ''${if def:sender_address_domain\ + {$sender_address_domain}\ + {$sender_helo_name}} + defer + spf = temperror + log_message = spf=$spf_result; deferred + message = temporary error during SPF validation; \ + please try again later + warn + spf = none : neutral + log_message = spf=$spf_result + accept + add_header = $spf_received + '' else indent /* exim */ '' + accept + ''} begin routers |