113 lines
5.5 KiB
Nix
113 lines
5.5 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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submission_header_cleanup_regex = pkgs.writeText "submission_header_cleanup_regex" ''
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/^Received:.*by ${config.services.mymailserver.mailFQDN} \(Postfix/ IGNORE
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'';
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pfvirtual_mailbox_domains = pkgs.writeText "virtual_mailbox_domains.cf" ''
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dbpath = ${config.services.mymailserver.internal.pfadminDataDir}/postfixadmin.db
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query = SELECT domain FROM domain WHERE domain='%s' AND active = '1'
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'';
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pfvirtual_alias_maps = pkgs.writeText "virtual_alias_maps.cf" ''
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dbpath = ${config.services.mymailserver.internal.pfadminDataDir}/postfixadmin.db
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query = SELECT goto FROM alias WHERE address='%s' AND active = '1'
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'';
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pfvirtual_alias_domain_maps = pkgs.writeText "virtual_alias_domain_maps.cf" ''
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dbpath = ${config.services.mymailserver.internal.pfadminDataDir}/postfixadmin.db
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query = SELECT goto FROM alias,alias_domain WHERE alias_domain.alias_domain = '%d' and alias.address = ('%u' || '@' || alias_domain.target_domain) AND alias.active = 1 AND alias_domain.active='1'
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'';
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pfvirtual_alias_domain_catchall_maps = pkgs.writeText "virtual_alias_domain_catchall_maps.cf" ''
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dbpath = ${config.services.mymailserver.internal.pfadminDataDir}/postfixadmin.db
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query = SELECT goto FROM alias,alias_domain WHERE alias_domain.alias_domain = '%d' and alias.address = ('@' || alias_domain.target_domain) AND alias.active = 1 AND alias_domain.active='1'
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'';
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pfvirtual_mailbox_maps = pkgs.writeText "virtual_mailbox_maps.cf" ''
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dbpath = ${config.services.mymailserver.internal.pfadminDataDir}/postfixadmin.db
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query = SELECT maildir FROM mailbox WHERE username='%s' AND active = '1'
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'';
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pfvirtual_alias_domain_mailbox_maps = pkgs.writeText "virtual_alias_domain_mailbox_maps.cf" ''
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dbpath = ${config.services.mymailserver.internal.pfadminDataDir}/postfixadmin.db
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query = SELECT maildir FROM mailbox,alias_domain WHERE alias_domain.alias_domain = '%d' and mailbox.username = ('%u' || '@' || alias_domain.target_domain) AND mailbox.active = 1 AND alias_domain.active='1'
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'';
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in
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{
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# Configure Postfix to support SQLite
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nixpkgs.config.packageOverrides = pkgs: { postfix = pkgs.postfix.override { withSQLite = true; }; };
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# SSL/TLS specific configuration
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security.acme.certs."postfix.${config.services.mymailserver.mailFQDN}" = {
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domain = "${config.services.mymailserver.mailFQDN}";
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group = config.services.postfix.group;
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postRun = "systemctl restart postfix.service";
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# cheat by getting some settings from another certificate configured through nginx.
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webroot = config.security.acme.certs."${config.services.mymailserver.mailFQDN}".webroot;
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};
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# Make sure at least the self-signed certs are available before trying to start postfix
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systemd.services.postfix.after = [ "acme-selfsigned-certificates.target" ];
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# Setup Postfix
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networking.firewall.allowedTCPPorts = [ 25 465 587 ];
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services.postfix = {
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enable = true;
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enableSmtp = true;
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enableSubmission = true;
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config = {
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message_size_limit = "${toString (256 * 1024 * 1024)}";
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mydestination = "";
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myhostname = config.services.mymailserver.mailFQDN;
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mynetworks_style = "host";
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recipient_delimiter = "+";
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relay_domains = "";
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smtpd_milters = "unix:${config.services.mymailserver.internal.rspamdMilterSocket}";
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non_smtpd_milters = "unix:${config.services.mymailserver.internal.rspamdMilterSocket}";
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smtpd_sasl_path = config.services.mymailserver.internal.dovecotAuthSocket;
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smtpd_sasl_type = "dovecot";
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smtpd_tls_auth_only = "yes";
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smtpd_tls_chain_files = "/var/lib/acme/postfix.${config.services.mymailserver.mailFQDN}/full.pem";
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smtpd_tls_loglevel = "1";
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smtpd_tls_received_header = "yes";
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smtpd_tls_security_level = "may";
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smtp_tls_loglevel = "1";
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smtp_tls_security_level = "may";
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virtual_alias_maps = "proxy:sqlite:${pfvirtual_alias_maps}, proxy:sqlite:${pfvirtual_alias_domain_maps}, proxy:sqlite:${pfvirtual_alias_domain_catchall_maps}";
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virtual_mailbox_domains = "proxy:sqlite:${pfvirtual_mailbox_domains}";
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virtual_mailbox_maps = "proxy:sqlite:${pfvirtual_mailbox_maps}, proxy:sqlite:${pfvirtual_alias_domain_mailbox_maps}";
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virtual_transport = "lmtp:unix:${config.services.mymailserver.internal.dovecotLmtpSocket}";
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} // (
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if (config.services.mymailserver.logging == false) then
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{
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maillog_file = "/dev/null";
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maillog_file_prefixes = "/dev/null";
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}
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else
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{}
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);
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masterConfig.submission.args = [ "-o" "cleanup_service_name=submission_cleanup" ];
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masterConfig."submission_cleanup" = {
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command = "cleanup";
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args = [ "-o" "header_checks=regexp:${submission_header_cleanup_regex}" ];
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private = false;
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maxproc = 0;
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};
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masterConfig.submissions = {
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type = config.services.postfix.masterConfig.submission.type;
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private = config.services.postfix.masterConfig.submission.private;
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command = "smtpd";
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args = [
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"-o" "smtpd_tls_wrappermode=yes"
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"-o" "cleanup_service_name=submission_cleanup"
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"-o" "milter_macro_daemon_name=ORIGINATING"
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"-o" "smtpd_client_restrictions=permit_sasl_authenticated,reject"
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"-o" "smtpd_sasl_auth_enable=yes"
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"-o" "cleanup_service_name=submission_cleanup"
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];
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};
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masterConfig.postlog = {
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type = "unix-dgram";
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private = false;
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maxproc = 1;
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command = "postlogd";
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};
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rootAlias = config.services.mymailserver.adminAddress;
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postmasterAlias = config.services.mymailserver.adminAddress;
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};
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}
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