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index.js
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'use strict';
// disable config loading by WildDuck
process.env.DISABLE_WILD_CONFIG = 'true';
const os = require('os');
const db = require('./lib/db');
const DSN = require('haraka-dsn');
const dns = require('dns');
const ObjectId = require('mongodb').ObjectId;
const punycode = require('punycode.js');
const SRS = require('srs.js');
const counters = require('wildduck/lib/counters');
const tools = require('wildduck/lib/tools');
const StreamCollect = require('./lib/stream-collect');
const Maildropper = require('wildduck/lib/maildropper');
const FilterHandler = require('wildduck/lib/filter-handler');
const BimiHandler = require('wildduck/lib/bimi-handler');
const autoreply = require('wildduck/lib/autoreply');
const wdErrors = require('wildduck/lib/errors');
const Gelf = require('gelf');
const addressparser = require('nodemailer/lib/addressparser');
const libmime = require('libmime');
const { promisify } = require('util');
const { mail: hookMail, dataPost: hookDataPost } = require('./lib/hooks');
DSN.rcpt_too_fast = () =>
DSN.create(
450,
'The user you are trying to contact is receiving mail at a rate that\nprevents additional messages from being delivered. Please resend your\nmessage at a later time. If the user is able to receive mail at that\ntime, your message will be delivered.',
2,
1
);
// default mbox_full is 450
DSN.mbox_full_554 = () => DSN.create(554, 'Mailbox full', 2, 2);
const defaultSpamRejectMessage =
'Our system has detected that this message is likely unsolicited mail.\nTo reduce the amount of spam this message has been blocked.';
exports.register = function () {
const plugin = this;
plugin.logdebug('Initializing WildDuck plugin.');
plugin.load_wildduck_cfg();
plugin.register_hook('init_master', 'open_database');
plugin.register_hook('init_child', 'open_database');
plugin.resolver = async (name, rr) => await dns.promises.resolve(name, rr);
};
exports.load_wildduck_cfg = function () {
this.cfg = this.config.get(
'wildduck.yaml',
{
booleans: ['attachments.decodeBase64', 'sender.enabled']
},
() => {
this.load_wildduck_cfg();
}
);
};
exports.open_database = function (next, server) {
const plugin = this;
plugin.srsRewriter = new SRS({
secret: (plugin.cfg.srs && plugin.cfg.srs.secret) || 'secret'
});
plugin.rspamd = plugin.cfg.rspamd || {};
plugin.rspamd.forwardSkip = Number(plugin.rspamd.forwardSkip) || Number(plugin.cfg.spamScoreForwarding) || 0;
plugin.rspamd.blacklist = [].concat(plugin.rspamd.blacklist || []);
plugin.rspamd.softlist = [].concat(plugin.rspamd.softlist || []);
plugin.rspamd.responses = plugin.rspamd.responses || {};
plugin.hostname = (plugin.cfg.gelf && plugin.cfg.gelf.hostname) || os.hostname();
plugin.gelf =
plugin.cfg.gelf && plugin.cfg.gelf.enabled
? new Gelf(plugin.cfg.gelf.options)
: {
// placeholder
emit: (level, message) => {
plugin.loginfo('GELF ' + JSON.stringify(message));
}
};
wdErrors.setGelf(plugin.gelf);
plugin.loggelf = message => {
if (typeof message === 'string') {
message = {
short_message: message
};
}
message = message || {};
const component = (plugin.cfg.gelf && plugin.cfg.gelf.component) || 'mx';
if (!message.short_message || message.short_message.indexOf(component.toUpperCase()) !== 0) {
message.short_message = component.toUpperCase() + ' ' + (message.short_message || '');
}
message.facility = component; // facility is deprecated but set by the driver if not provided
message.host = plugin.hostname;
message.timestamp = Date.now() / 1000;
message._component = component;
message._interface = message._interface || 'mx';
Object.keys(message).forEach(key => {
if (!message[key]) {
delete message[key];
}
});
plugin.gelf.emit('gelf.log', message);
};
const createConnection = done => {
db.connect(server.notes.redis, plugin.cfg, (err, db) => {
if (err) {
return done(err);
}
plugin.db = db;
plugin.ttlcounter = counters(db.redis).ttlcounter;
plugin.ttlcounterAsync = promisify(plugin.ttlcounter);
plugin.db.messageHandler.loggelf = message => plugin.loggelf(message);
plugin.db.userHandler.loggelf = message => plugin.loggelf(message);
plugin.maildrop = new Maildropper({ db, ...plugin.cfg.sender });
plugin.filterHandler = new FilterHandler({
db,
sender: plugin.cfg.sender,
messageHandler: plugin.db.messageHandler,
loggelf: message => plugin.loggelf(message)
});
plugin.bimiHandler = BimiHandler.create({
database: db.database,
loggelf: message => plugin.loggelf(message)
});
done();
});
};
let returned = false;
const tryCreateConnection = () => {
createConnection(err => {
if (err) {
if (!returned) {
plugin.logcrit('Database connection failed. ' + err.message);
returned = true;
next();
}
// keep trying to open up the DB connection
setTimeout(tryCreateConnection, 2 * 1000);
return;
}
plugin.loginfo('Database connection opened');
if (!returned) {
returned = true;
next();
}
});
};
tryCreateConnection();
};
exports.normalize_address = function (address) {
if (/^SRS\d+=/i.test(address.user)) {
// Try to fix case-mangled addresses where the intermediate MTA converts user part to lower case
// and thus breaks hash verification
const localAddress = address.user
// ensure that address starts with uppercase SRS
.replace(/^SRS\d+=/i, val => val.toUpperCase())
// ensure that the first entity that looks like SRS timestamp is uppercase
.replace(/([-=+][0-9a-f]{4})(=[A-Z2-7]{2}=)/i, (str, sig, ts) => sig + ts.toUpperCase());
return localAddress + '@' + punycode.toUnicode(address.host.toLowerCase().trim());
}
return tools.normalizeAddress(address.address());
};
exports.increment_forward_counters = async function (connection) {
const plugin = this;
const txn = connection.transaction;
if (!txn || !txn.notes || !txn.notes.targets || !txn.notes.targets.forwardCounters) {
return false;
}
const { forwardCounters } = txn.notes.targets;
for (const [key, { increment, limit }] of forwardCounters.entries()) {
try {
const ttlres = await plugin.ttlcounterAsync('wdf:' + key, increment, limit, false);
connection.loginfo(plugin, `Forward counter updated for ${key} (${increment}/${limit}): ${JSON.stringify(ttlres)}`);
} catch (err) {
connection.logerror(plugin, err.message);
}
}
};
exports.handle_forwarding_address = async function (connection, address, addressData) {
const plugin = this;
const txn = connection.transaction;
if (!txn || !txn.notes || !txn.notes.targets || !txn.notes.targets.forwardCounters) {
connection.logerror(plugin, 'Empty transaction, can not forward');
return false;
}
const { forwards, autoreplies, /*users,*/ forwardCounters } = txn.notes.targets;
const forwardLimit = addressData.forwards || txn.notes.settings['const:max:forwards'];
let limitResult;
try {
limitResult = await plugin.ttlcounterAsync(
'wdf:' + addressData._id.toString(),
0, //addressData.targets.length,
forwardLimit,
false
);
} catch (err) {
// failed checks
err.resolution = {
full_message: err.stack,
_forward: 'yes',
_rate_limit: 'yes',
_selector: 'user',
_failure: 'yes',
_error: 'rate limit check failed',
_err_code: err.code
};
err.code = err.code || 'RateLimit';
throw err;
}
if (!limitResult.success) {
connection.lognotice(
'RATELIMITED target=' +
addressData.address +
' key=' +
addressData._id +
' limit=' +
addressData.forwards +
' value=' +
limitResult.value +
' ttl=' +
limitResult.ttl,
plugin,
connection
);
const error = new Error('Rate limit hit');
error.resolution = {
_forward: 'yes',
_rate_limit: 'yes',
_selector: 'user',
_error: 'too many attempts'
};
txn.notes.rejectCode = 'RATE_LIMIT';
error.responseAction = DENY;
error.responseMessage = DSN.rcpt_too_fast();
throw error;
}
if (addressData.forwardedDisabled) {
// forwarded address is disabled for whatever reason'
const error = new Error('Mailbox disabled');
error.resolution = {
_address: addressData._id.toString(),
_error: 'disabled forwarded address',
_disabled_forwarded: 'yes'
};
txn.notes.rejectCode = 'MBOX_DISABLED';
error.responseAction = DENY;
error.responseMessage = DSN.mbox_disabled();
throw error;
}
connection.loginfo(
plugin,
'FORWARDING rcpt=' +
address +
' address=' +
addressData.address +
'[' +
addressData._id +
']' +
' target=' +
addressData.targets.map(target => ((target && target.value) || target).toString().replace(/\?.*$/, '')).join(', ')
);
if (addressData.autoreply) {
autoreplies.set(addressData.addrview, addressData);
}
const forwardTargets = [];
for (const targetData of addressData.targets) {
if (targetData.type === 'relay') {
// relay is not rate limited
targetData.recipient = addressData.address || address;
// Do not use `targetData.value` alone as it might be the same for multiple recipients
forwards.set(`${targetData.recipient}:${targetData.value}`, targetData);
forwardTargets.push(targetData.recipient + ':' + (targetData.value || '').toString().replace(/\?.*$/, ''));
continue;
} else {
if (targetData.type !== 'mail') {
forwardTargets.push(address + ':' + targetData.value);
targetData.recipient = address;
} else {
forwardTargets.push(targetData.value);
}
forwards.set(targetData.value, targetData);
continue;
}
}
forwardCounters.set(addressData._id.toString(), {
increment: forwardTargets.length,
limit: forwardLimit
});
txn.notes.rejectCode = false;
return {
resolution: {
_forward: 'yes',
_rcpt_accepted: 'yes',
_forward_to: forwardTargets.join('\n') || 'empty_list'
}
};
};
exports.hook_deny = function (next, connection, params) {
const plugin = this;
const txn = connection.transaction;
const remoteIp = connection.remote.ip;
if (txn === null) {
next();
return;
}
const [, , , , denyParams, denyHook] = params;
let rcpts;
switch (denyHook) {
case 'rcpt':
// only a single recipient failed
rcpts = [].concat((denyParams && denyParams[0]) || false);
break;
default:
// all recipients failed
rcpts = txn.rcpt_to || [];
if (!rcpts.length) {
rcpts = [false];
}
}
for (const rcpt of rcpts) {
let user;
const address = (rcpt && rcpt.address()) || false;
if (txn.notes.targets && txn.notes.targets.users) {
// try to resolve user id for the recipient address
for (const target of txn.notes.targets.users) {
const uid = target[0];
const info = target[1];
if (info && info.recipient === address) {
user = uid;
}
}
}
const logdata = {
short_message: '[DENY:' + txn.notes.sender + '] ' + txn.uuid,
_mail_action: 'deny',
_from: txn.notes.sender,
_queue_id: txn.uuid,
_ip: remoteIp,
_proto: txn.notes.transmissionType,
_to: address,
_user: user,
_rejector: params && params[2],
_reject_code: txn.notes.rejectCode || (params && params[2]) || 'UNKNOWN'
};
const headerFrom = plugin.getHeaderFrom(txn);
if (headerFrom) {
logdata._header_from = headerFrom.address;
logdata._header_from_name = headerFrom.provided && headerFrom.provided.name;
logdata._header_from_value = txn.header.get_all('From').join('; ');
}
const err = params && params[1];
if (typeof err === 'string') {
logdata._error = err;
} else if (err && typeof err === 'object') {
Object.keys(err).forEach(key => {
if (key === 'msg') {
logdata._error = err[key];
} else {
logdata['_error_' + key] = err[key];
}
});
}
plugin.loggelf(logdata);
}
next();
};
exports.hook_max_data_exceeded = function (next, connection) {
const plugin = this;
const txn = connection.transaction;
const remoteIp = connection.remote.ip;
if (txn === null) {
next();
return;
}
let rcpts = txn.rcpt_to || [];
if (!rcpts.length) {
rcpts = [false];
}
for (const rcpt of rcpts) {
let user;
const address = (rcpt && rcpt.address()) || false;
if (txn.notes.targets && txn.notes.targets.users) {
// try to resolve user id for the recipient address
for (const target of txn.notes.targets.users) {
const uid = target[0];
const info = target[1];
if (info && info.recipient === address) {
user = uid;
}
}
}
const logdata = {
short_message: '[DENY:' + txn.notes.sender + '] ' + txn.uuid,
_mail_action: 'deny',
_from: txn.notes.sender,
_queue_id: txn.uuid,
_ip: remoteIp,
_proto: txn.notes.transmissionType,
_to: address,
_user: user,
_reject_code: 'max_data_exceeded'
};
plugin.loggelf(logdata);
}
next();
};
exports.init_wildduck_transaction = async function (connection) {
const txn = connection.transaction;
// could be false on rcpt hook if mail hook didn't run
if (txn.notes.id) return;
txn.notes.id = new ObjectId();
txn.notes.rateKeys = [];
txn.notes.targets = {
users: new Map(),
forwards: new Map(),
recipients: new Set(),
autoreplies: new Map(),
forwardCounters: new Map()
};
txn.notes.transmissionType = []
.concat(connection.greeting === 'EHLO' ? 'E' : [])
.concat('SMTP')
.concat(connection.tls_cipher ? 'S' : [])
.join('');
try {
txn.notes.settings = await this.db.settingsHandler.getMulti(['const:max:storage', 'const:max:recipients', 'const:max:forwards']);
} catch (err) {
connection.logerror(this, err);
}
};
exports.hook_mail = function (next, connection, params) {
const plugin = this;
plugin.init_wildduck_transaction(connection).then(() => {
hookMail(plugin, connection, params)
.then(() => {
next();
})
.catch(err => next(err.smtpAction || DENYSOFT, err.message));
});
};
exports.hook_data_post = function (next, connection) {
return hookDataPost(next, this, connection);
};
exports.hook_rcpt = function (next, connection, params) {
const plugin = this;
const txn = connection.transaction;
let tryCount = 0;
let tryTimer = false;
let returned = false;
let waitTimeout = false;
const runHandler = () => {
clearTimeout(tryTimer);
plugin.init_wildduck_transaction(connection).then(() => {
plugin.real_rcpt_handler(
(...args) => {
clearTimeout(waitTimeout);
if (returned) {
return;
}
returned = true;
const err = args && args[0];
if (err && /Error$/.test(err.name)) {
connection.logerror(plugin, err.message);
txn.notes.rejectCode = 'ERRC01';
return next(DENYSOFT, 'Failed to process recipient, try again [ERRC01]');
}
next(...args);
},
connection,
params
);
});
};
// rcpt check requires access to the db which might not be available yet
const runCheck = () => {
if (returned) {
return;
}
if (!plugin.db) {
// database not opened yet
if (tryCount++ < 5) {
tryTimer = setTimeout(runCheck, tryCount * 150);
return;
}
clearTimeout(waitTimeout);
returned = true;
txn.notes.rejectCode = 'ERRC02';
return next(DENYSOFT, 'Failed to process recipient, try again [ERRC02]');
}
runHandler();
};
waitTimeout = setTimeout(() => {
clearTimeout(waitTimeout);
if (returned) {
return;
}
returned = true;
txn.notes.rejectCode = 'ERRC03';
return next(DENYSOFT, 'Failed to process recipient, try again [ERRC03]');
}, 8 * 1000);
runCheck();
};
exports.real_rcpt_handler = function (next, connection, params) {
const plugin = this;
const txn = connection.transaction;
const remoteIp = connection.remote_ip;
const { recipients, forwards, users } = txn.notes.targets;
const rcpt = params[0];
if (/\*/.test(rcpt.user)) {
// Using * is not allowed in addresses
txn.notes.rejectCode = 'NO_SUCH_USER';
return next(DENY, DSN.no_such_user());
}
const address = plugin.normalize_address(rcpt);
recipients.add(address);
let resolution = false;
const hookDone = (...args) => {
if (resolution) {
const message = {
short_message: '[RCPT TO:' + rcpt.address() + '] ' + txn.uuid,
_mail_action: 'rcpt_to',
_from: txn.notes.sender,
_to: rcpt.address(),
_queue_id: txn.uuid,
_ip: remoteIp,
_proto: txn.notes.transmissionType
};
Object.keys(resolution).forEach(key => {
if (resolution[key]) {
message[key] = resolution[key];
}
});
plugin.loggelf(message);
}
next(...args);
};
connection.logdebug(plugin, 'Checking validity of ' + address);
if (/^SRS\d+=/.test(address)) {
let reversed = false;
try {
reversed = plugin.srsRewriter.reverse(address.substr(0, address.indexOf('@')));
const toDomain = punycode.toASCII((reversed[1] || '').toString().toLowerCase().trim());
if (!toDomain) {
connection.logerror(plugin, 'SRS FAILED rcpt=' + address + ' error=Missing domain');
resolution = {
_srs: 'yes',
_error: 'missing domain'
};
txn.notes.rejectCode = 'NO_SUCH_USER';
return hookDone(DENY, DSN.no_such_user());
}
reversed = reversed.join('@');
} catch (err) {
connection.logerror(plugin, 'SRS FAILED rcpt=' + address + ' error=' + err.message);
resolution = {
full_message: err.stack,
_srs: 'yes',
_failure: 'yes',
_error: 'srs check failed',
_err_code: err.code
};
txn.notes.rejectCode = 'NO_SUCH_USER';
return hookDone(DENY, DSN.no_such_user());
}
if (reversed) {
// accept SRS rewritten address
const key = reversed;
const selector = 'rcpt';
return plugin.checkRateLimit(connection, selector, key, false, (err, success) => {
if (err) {
resolution = {
full_message: err.stack,
_srs: 'yes',
_rate_limit: 'yes',
_selector: selector,
_failure: 'yes',
_error: 'rate limit check failed',
_err_code: err.code
};
err.code = err.code || 'RateLimit';
return hookDone(err);
}
if (!success) {
resolution = {
_srs: 'yes',
_rate_limit: 'yes',
_selector: selector,
_error: 'too many attempts'
};
txn.notes.rejectCode = 'RATE_LIMIT';
return hookDone(DENYSOFT, DSN.rcpt_too_fast());
}
// update rate limit for this address after delivery
txn.notes.rateKeys.push({ selector, key });
connection.loginfo(plugin, `SRS USING rcpt=${address} target=${reversed}`);
forwards.set(reversed, { type: 'mail', value: reversed, recipient: rcpt.address() });
resolution = {
_srs: 'yes',
_rcpt_accepted: 'yes',
_forward_to: reversed
};
txn.notes.rejectCode = false;
return hookDone(OK);
});
}
}
const checkIpRateLimit = (userData, done) => {
if (!remoteIp) {
return done();
}
const key = remoteIp + ':' + userData._id.toString();
const selector = 'rcptIp';
plugin.checkRateLimit(connection, selector, key, false, (err, success) => {
if (err) {
resolution = {
full_message: err.stack,
_rate_limit: 'yes',
_selector: selector,
_user: userData._id.toString(),
_default_address: rcpt.address() !== userData.address ? userData.address : '',
_error: 'rate limit check failed',
_failure: 'yes',
_err_code: err.code
};
err.code = err.code || 'RateLimit';
return hookDone(err);
}
if (!success) {
resolution = {
_rate_limit: 'yes',
_selector: selector,
_error: 'too many attempts',
_user: userData._id.toString(),
_default_address: rcpt.address() !== userData.address ? userData.address : ''
};
txn.notes.rejectCode = 'RATE_LIMIT';
return hookDone(DENYSOFT, DSN.rcpt_too_fast());
}
// update rate limit for this address after delivery
txn.notes.rateKeys.push({ selector, key });
return done();
});
};
plugin.db.userHandler.resolveAddress(
address,
{
wildcard: true,
projection: {
name: true,
address: true,
addrview: true,
forwards: true,
autoreply: true,
targets: true, // only forwarded address has `targets` set
forwardedDisabled: true // only forwarded address has `targets` set
}
},
(err, addressData) => {
if (err) {
resolution = {
full_message: err.stack,
_api: 'resolveAddress',
_db_query: 'address:' + address,
_error: 'failed to resolve an address',
_failure: 'yes',
_err_code: err.code
};
err.code = err.code || 'ResolveAddress';
return hookDone(err);
}
if (addressData && addressData.targets) {
return plugin
.handle_forwarding_address(connection, address, addressData)
.then(result => {
if (result && result.resolution) {
resolution = result.resolution;
}
hookDone(OK);
})
.catch(err => {
if (err.resolution) {
resolution = err.resolution;
}
if (err.responseAction) {
return hookDone(err.responseAction, err.responseMessage || err);
} else {
return hookDone(err);
}
});
}
if (!addressData || !addressData.user) {
connection.logdebug(plugin, 'No such user ' + address);
resolution = {
_error: 'no such user',
_unknown_user: 'yes'
};
txn.notes.rejectCode = 'NO_SUCH_USER';
return hookDone(DENY, DSN.no_such_user());
}
plugin.db.userHandler.get(
addressData.user,
{
// extra fields are needed later in the filtering step
name: true,
address: true,
forwards: true,
receivedMax: true,
targets: true,
autoreply: true,
encryptMessages: true,
encryptForwarded: true,
pubKey: true,
spamLevel: true,
storageUsed: true,
quota: true,
tagsview: true
},
(err, userData) => {
if (err) {
resolution = {
full_message: err.stack,
_api: 'getUser',
_db_query: 'user:' + addressData.user,
_error: 'failed to fetch user',
_failure: 'yes',
_err_code: err.code
};
err.code = err.code || 'GetUserData';
return hookDone(err);
}
if (!userData) {
resolution = {
_error: 'no such user',
_unknown_user: 'yes'
};
txn.notes.rejectCode = 'NO_SUCH_USER';
return hookDone(DENY, DSN.no_such_user());
}
if (userData.disabled) {
// user is disabled for whatever reason
resolution = {
_user: userData._id.toString(),
_error: 'disabled user',
_disabled_user: 'yes'
};
txn.notes.rejectCode = 'MBOX_DISABLED';
return hookDone(DENY, DSN.mbox_disabled());
}
// max quota for the user
const quota = userData.quota || txn.notes.settings['const:max:storage'];
if (userData.storageUsed && quota <= userData.storageUsed) {
// can not deliver mail to this user, over quota
resolution = {
_user: userData._id.toString(),
_error: 'user over quota',
_over_quota: 'yes',
_default_address: rcpt.address() !== userData.address ? userData.address : ''
};
txn.notes.rejectCode = 'MBOX_FULL';
return hookDone(DENY, DSN.mbox_full_554());
}
checkIpRateLimit(userData, () => {
const key = userData._id.toString();
const selector = 'rcpt';
plugin.checkRateLimit(connection, selector, key, userData.receivedMax, (err, success) => {
if (err) {
resolution = {
full_message: err.stack,
_rate_limit: 'yes',
_selector: selector,
_user: userData._id.toString(),
_default_address: rcpt.address() !== userData.address ? userData.address : '',
_error: 'rate limit check failed',
_failure: 'yes',
_err_code: err.code
};
err.code = err.code || 'RateLimit';
return hookDone(err);
}
if (!success) {
resolution = {
_rate_limit: 'yes',
_selector: selector,
_error: 'too many attempts',
_user: userData._id.toString(),
_default_address: rcpt.address() !== userData.address ? userData.address : ''
};
txn.notes.rejectCode = 'RATE_LIMIT';
return hookDone(DENYSOFT, DSN.rcpt_too_fast());
}
connection.loginfo(plugin, 'RESOLVED rcpt=' + rcpt.address() + ' user=' + userData.address + '[' + userData._id + ']');
// update rate limit for this address after delivery
txn.notes.rateKeys.push({ selector, key, limit: userData.receivedMax });
users.set(userData._id.toString(), {
userData,
recipient: rcpt.address()
});
resolution = {
_user: userData._id.toString(),
_rcpt_accepted: 'yes',
_default_address: rcpt.address() !== userData.address ? userData.address : ''
};
txn.notes.rejectCode = false;
hookDone(OK);
});
});
}
);
}
);
};
exports.hook_queue = function (next, connection) {
const plugin = this;
const txn = connection.transaction;
const queueId = txn.uuid;
const remoteIp = connection.remote.ip;
const { forwards, autoreplies, users } = txn.notes.targets;
const transhost = connection.hello.host;
const blacklisted = this.checkRspamdBlacklist(txn);
if (blacklisted) {
// can not send DSN object for hook_queue as it is converted to [object Object]
txn.notes.rejectCode = blacklisted.key;
return next(DENY, plugin.dsnSpamResponse(txn, blacklisted.key).reply);
}
const softlisted = this.checkRspamdSoftlist(txn);
if (softlisted) {
// can not send DSN object for hook_queue as it is converted to [object Object]
txn.notes.rejectCode = softlisted.key;
return next(DENYSOFT, plugin.dsnSpamResponse(txn, softlisted.key).reply);
}
// results about verification (TLS, SPF, DKIM)
const verificationResults = {
tls: false,
spf: false,
dkim: false,
arc: false,
bimi: false
};
const tlsResults = connection.results.get('tls');
if (tlsResults && tlsResults.enabled) {
verificationResults.tls = tlsResults.cipher;
}
const envelopeFrom = txn.notes.sender;
const headerFrom = plugin.getHeaderFrom(txn);
// SPF result
if (txn.notes.spfResult?.status?.result === 'pass' && txn.notes.spfResult?.domain) {
verificationResults.spf = txn.notes.spfResult?.domain;
}
// DKIM result
// Sort signatures, prefer passing and aligned ones
const dkimResults = (txn.notes.dkimResult?.results || []).sort((a, b) => {
if (a.status === 'pass' && b.status !== 'pass') {
return -1;
}
if (a.status !== 'pass' && b.status === 'pass') {
return 1;
}
if (a.status?.aligned && !b.status?.aligned) {
return -1;
}
if (!a.status?.aligned && b.status?.aligned) {
return 1;
}
if (a.status?.aligned && b.status?.aligned) {