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index.js
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'use strict';
const os = require('os');
const punycode = require('punycode.js');
const addressparser = require('nodemailer/lib/addressparser');
const MimeNode = require('nodemailer/lib/mime-node');
const MessageHandler = require('wildduck/lib/message-handler');
const UserHandler = require('wildduck/lib/user-handler');
const DkimHandler = require('wildduck/lib/dkim-handler');
const AuditHandler = require('wildduck/lib/audit-handler');
const wdErrors = require('wildduck/lib/errors');
const counters = require('wildduck/lib/counters');
const tools = require('wildduck/lib/tools');
const CertHandler = require('wildduck/lib/cert-handler');
const { SettingsHandler } = require('wildduck/lib/settings-handler');
const SRS = require('srs.js');
const Gelf = require('gelf');
const util = require('util');
const libmime = require('libmime');
const dns = require('dns');
module.exports.title = 'WildDuck MSA';
module.exports.init = function (app, done) {
const users = new WeakMap();
const redisClient = app.db.redis;
const database = app.db.database;
const usersdb = app.db.users;
const gridfsdb = app.db.gridfs;
const component = ((app.config.gelf && app.config.gelf.component) || 'mta').toUpperCase();
const maxSubjectLineLogLengthBytes = (app.config.gelf && app.config.gelf.subjectLength) || 32766 - 1; // 32766 is max gelf default, do -1 for good measure
const hostname = app.config.hostname || os.hostname();
const gelf =
app.config.gelf && app.config.gelf.enabled
? new Gelf(app.config.gelf.options)
: {
// placeholder
emit: (ev, entry) => app.logger.info('GELF', JSON.stringify(entry))
};
wdErrors.setGelf(gelf);
const loggelf = message => {
if (!message) {
return false;
}
if (typeof message === 'string') {
message = {
short_message: message
};
}
message = message || {};
if (!message.short_message || message.short_message.indexOf(component.toUpperCase()) !== 0) {
message.short_message = component.toUpperCase() + ' ' + (message.short_message || '');
}
message.facility = (app.config.gelf && app.config.gelf.component) || 'mta'; // facility is deprecated but set by the driver if not provided
message.host = hostname;
message.timestamp = Date.now() / 1000;
message._component = (app.config.gelf && app.config.gelf.component) || 'mta';
Object.keys(message).forEach(key => {
if (!message[key]) {
delete message[key];
}
});
gelf.emit('gelf.log', message);
};
const dkimHandler = new DkimHandler({
cipher: app.config.dkim && app.config.dkim.cipher,
secret: app.config.dkim && app.config.dkim.secret,
database,
loggelf: message => loggelf(message)
});
const certHandler = new CertHandler({
cipher: app.config.certs && app.config.certs.cipher,
secret: app.config.certs && app.config.certs.secret,
database,
redis: redisClient,
users: usersdb,
acmeConfig: app.config.acme,
loggelf: message => loggelf(message)
});
const settingsHandler = new SettingsHandler({
db: database
});
const ttlcounter = counters(redisClient).ttlcounter;
const srsRewriter = new SRS({
secret: (app.config.srs && app.config.srs.secret) || '?'
});
const messageHandler = new MessageHandler({
database,
redis: redisClient,
users: usersdb,
gridfs: gridfsdb,
attachments: app.config.attachments || {
type: 'gridstore',
bucket: 'attachments'
},
loggelf: message => loggelf(message)
});
const userHandler = new UserHandler({
database,
redis: redisClient,
gridfs: gridfsdb,
users: usersdb,
loggelf: message => loggelf(message)
});
const auditHandler = new AuditHandler({
database,
gridfs: gridfsdb,
users: usersdb,
bucket: 'audit',
loggelf: message => loggelf(message)
});
const encryptMessage = util.promisify(messageHandler.encryptMessage.bind(messageHandler));
const prepareMessage = util.promisify(messageHandler.prepareMessage.bind(messageHandler));
const addMessage = util.promisify((...args) => {
let callback = args.pop();
messageHandler.add(...args, (err, status, data) => {
if (err) {
return callback(err);
}
return callback(null, { status, data });
});
});
const timedRunner = (promise, time) =>
new Promise((resolve, reject) => {
let timer = setTimeout(() => {
let error = new Error('Timeout');
error.code = 'ETIMEDOUT';
reject(error);
}, time);
promise
.then(result => {
clearTimeout(timer);
resolve(result);
})
.catch(err => {
clearTimeout(timer);
reject(err);
});
});
const mxCache = new Map();
const resolveMx = async domain => {
if (mxCache.has(domain)) {
let cached = mxCache.get(domain);
if (cached.error && cached.updated >= Date.now() - 60 * 60 * 1000) {
throw cached.error;
}
if (cached.value && cached.updated >= Date.now() - 8 * 60 * 60 * 1000) {
return cached.value;
}
}
try {
let value = await dns.promises.resolveMx(domain);
mxCache.set(domain, { value, updated: Date.now() });
return value;
} catch (err) {
mxCache.set(domain, { error: err, updated: Date.now() });
throw err;
}
};
const regexCache = new Map();
const comparePattern = (pattern, input) => {
let regex;
if (regexCache.has(pattern)) {
regex = regexCache.get(pattern);
}
if (!regex) {
let escaped = pattern.replace(/[.+?^${}()|[\]\\]/g, '\\$&').replace(/\*/g, '.*');
regex = new RegExp(`^${escaped}$`);
regexCache.set(pattern, regex);
}
return regex.test(input);
};
const matcher = (patterns, input) => {
for (let pattern of patterns) {
if (comparePattern(pattern, input)) {
return true;
}
}
return false;
};
const interfaces = [].concat(app.config.interfaces || '*');
const allInterfaces = interfaces.includes('*');
app.addHook('smtp:init', async server => {
let maxRcptTo = await settingsHandler.get('const:max:rcpt_to');
if (maxRcptTo) {
server.options.maxRecipients = maxRcptTo;
}
});
// handle user authentication
app.addHook('smtp:auth', (auth, session, next) => {
if (!checkInterface(session.interface)) {
return next();
}
if (auth.method === 'XCLIENT') {
// special proxied connection where authentication is handled upstream
// XCLIENT is only available if smtp server has useXClient option set to true
return userHandler.get(auth.username, { username: true, address: true }, (err, userData) => {
if (err) {
return next(err);
}
if (!userData) {
let message = 'Authentication failed';
err = new Error(message);
err.responseCode = 535;
err.name = 'SMTPResponse'; // do not throw
loggelf({
short_message: '[AUTH FAIL:' + auth.username + '] ' + session.id,
_auth_fail: 'yes',
_mail_action: 'auth',
_username: auth.username,
_xclient: 'yes',
_session_id: session.id,
_ip: session.remoteAddress
});
return next(err);
}
let username = auth.username;
if (auth.username.indexOf('@') >= 0) {
let parts = auth.username.split('@');
if (parts.length === 2 && parts[0] && parts[1] && /[\x80-\xff]/.test(parts[1])) {
try {
username = parts[0] + '@' + punycode.toASCII(parts[1]);
} catch (err) {
// ignore?
}
}
}
auth.username = userData.username !== username ? userData.username + '[' + username + ']' : userData.username;
next();
});
}
userHandler.authenticate(
auth.username,
auth.password,
'smtp',
{
protocol: 'SMTP',
ip: session.remoteAddress
},
(err, result) => {
if (err) {
return next(err);
}
if (!result || (result.scope === 'master' && result.require2fa)) {
let message = 'Authentication failed';
if (result) {
message = 'You need to use an application specific password';
}
err = new Error(message);
err.responseCode = 535;
err.name = 'SMTPResponse'; // do not throw
loggelf({
short_message: '[AUTH FAIL:' + auth.username + '] ' + session.id,
_auth_fail: 'yes',
_mail_action: 'auth',
_username: auth.username,
_require_asp: result ? 'yes' : '',
_session_id: session.id,
_ip: session.remoteAddress
});
return next(err);
}
let username = auth.username;
if (auth.username.indexOf('@') >= 0) {
let parts = auth.username.split('@');
if (parts.length === 2 && parts[0] && parts[1] && /[\x80-\xff]/.test(parts[1])) {
try {
username = parts[0] + '@' + punycode.toASCII(parts[1]);
} catch (err) {
// ignore?
}
}
}
loggelf({
short_message: '[AUTH OK:' + username + '] ' + session.id,
_auth_ok: 'yes',
_mail_action: 'auth',
_username: auth.username,
_scope: result.scope,
_session_id: session.id,
_ip: session.remoteAddress
});
auth.username = result.username !== username ? result.username + '[' + username + ']' : result.username;
next();
}
);
});
// use SNI cert if available
app.addHook('smtp:sni', (servername, data, next) => {
if (!servername) {
return next();
}
certHandler
.getContextForServername(
servername,
Object.assign({}, (app.config.certs && app.config.certs.tlsOptions) || {}),
{
source: 'smtp'
},
{
loggelf: message => loggelf(message)
}
)
.then(ctx => {
data.secureContext = ctx;
next(null);
})
.catch(err => next(err));
});
// Check if an user is allowed to use specific address, if not then override using the default
app.addHook('message:headers', (envelope, messageInfo, next) => {
if (!checkInterface(envelope.interface)) {
return next();
}
// Check From: value. Add if missing or rewrite if needed
let headerFrom = envelope.headers.getFirst('from');
let headerFromList;
let headerFromObj;
let headerFromName;
if (headerFrom) {
headerFromList = addressparser(headerFrom);
if (headerFromList.length) {
headerFromObj = headerFromList[0] || {};
if (headerFromObj.group) {
headerFromObj = {};
}
if (headerFromObj.name) {
try {
headerFromName = libmime.decodeWords(headerFromObj.name).trim();
} catch (err) {
headerFromName = headerFromObj.name;
}
}
}
}
getUser(envelope, (err, userData) => {
if (err) {
return next(err);
}
let normalizedAddress;
normalizedAddress = tools.normalizeAddress(envelope.from);
normalizedAddress =
normalizedAddress.substr(0, normalizedAddress.indexOf('@')).replace(/\./g, '') + normalizedAddress.substr(normalizedAddress.indexOf('@'));
let checkAddress = (address, done) => {
if (userData.fromWhitelist && userData.fromWhitelist.length) {
let nAddr = tools.normalizeAddress(address, false, {
removeLabel: true,
removeDots: true
});
if (
userData.fromWhitelist.some(addr => {
addr = tools.normalizeAddress(addr, false, {
removeLabel: true,
removeDots: true
});
if (addr === nAddr) {
return true;
}
if (addr.charAt(0) === '*' && nAddr.indexOf(addr.substr(1)) >= 0) {
return true;
}
if (addr.charAt(addr.length - 1) === '*' && nAddr.indexOf(addr.substr(0, addr.length - 1)) === 0) {
return true;
}
return false;
})
) {
// generate address object for whitelisted address
let normalizedAddress = tools.normalizeAddress(address);
normalizedAddress =
normalizedAddress.substr(0, normalizedAddress.indexOf('@')).replace(/\./g, '') +
normalizedAddress.substr(normalizedAddress.indexOf('@'));
return done(null, {
address,
addrview: normalizedAddress
});
}
}
userHandler.resolveAddress(address, { wildcard: true }, (err, addressData) => {
if (err) {
return done(err);
}
if (!addressData) {
return done(null, false);
}
if (addressData.user) {
if (addressData.user.toString() === userData._id.toString()) {
return done(null, addressData);
} else {
return done(null, false);
}
}
if (addressData.targets) {
if (addressData.targets.find(target => target.user && target.user.toString() === userData._id.toString())) {
return done(null, addressData);
} else {
return done(null, false);
}
}
return done(null, false);
});
};
checkAddress(envelope.from, (err, addressData) => {
if (err) {
return next(err);
}
if (!addressData) {
loggelf({
short_message: '[RWENVELOPE] ' + envelope.id,
_mail_action: 'rw_envelope_from',
_queue_id: envelope.id,
_envelope_from: envelope.from,
_rewrite_from: userData.address
});
// replace MAIL FROM address
app.logger.info(
'Rewrite',
'%s RWENVELOPE User %s tries to use "%s" as Return Path address, replacing with "%s"',
envelope.id,
userData.username,
envelope.from + (envelope.from === normalizedAddress ? '' : '[' + normalizedAddress + ']'),
userData.address
);
envelope.from = messageInfo.rwRcptFrom = userData.address;
}
if (!headerFromObj) {
return next();
}
normalizedAddress = tools.normalizeAddress(Buffer.from(headerFromObj.address, 'binary').toString());
normalizedAddress =
normalizedAddress.substr(0, normalizedAddress.indexOf('@')).replace(/\./g, '') + normalizedAddress.substr(normalizedAddress.indexOf('@'));
if (addressData && addressData.addrview === normalizedAddress) {
// same address
return next();
}
checkAddress(Buffer.from(headerFromObj.address, 'binary').toString(), (err, addressData) => {
if (err) {
return next(err);
}
if (addressData) {
// can send mail as this user
return next();
}
loggelf({
short_message: '[RWFROM] ' + envelope.id,
_mail_action: 'rw_header_from',
_queue_id: envelope.id,
_header_from: tools.normalizeAddress(headerFromObj.address),
_header_from_value: headerFrom,
_header_from_name: headerFromName,
_rewrite_from: envelope.from
});
app.logger.info(
'Rewrite',
'%s RWFROM User %s tries to use "%s" as From address, replacing with "%s"',
envelope.id,
userData.username,
headerFromObj.address + (headerFromObj.address === normalizedAddress ? '' : '[' + normalizedAddress + ']'),
envelope.from
);
headerFromObj.address = messageInfo.rwHeaderFrom = envelope.from;
let rootNode = new MimeNode();
let newHeaderFrom = rootNode._convertAddresses([headerFromObj]);
envelope.headers.update('From', newHeaderFrom);
envelope.headers.update('X-WildDuck-Original-From', headerFrom);
next();
});
});
});
});
app.addHook('queue:route', async (envelope, routing) => {
let { recipient, deliveryZone } = routing;
// Check for outbound MTA relay
await new Promise(resolve => {
getUser(envelope, (err, userData) => {
if (err) {
// no user data, just continue
return resolve();
}
if (userData.mtaRelay?.value) {
let relayData = userData.mtaRelay.value;
if (typeof relayData === 'string') {
relayData = tools.getRelayData(relayData);
}
const mxData = {};
mxData.mx = relayData.mx;
mxData.mxPort = relayData.mxPort;
mxData.mxAuth = relayData.mxAuth;
mxData.mxSecure = relayData.mxSecure;
mxData.skipSRS = true;
mxData.skipSTS = true;
routing.mxData = mxData;
}
return resolve();
});
});
if (deliveryZone !== 'default' || !app.config.mxRoutes) {
return;
}
let domain =
recipient &&
recipient
.substring(recipient.indexOf('@') + 1)
.toLowerCase()
.trim();
if (!domain) {
return;
}
try {
domain = punycode.toASCII(domain);
} catch (err) {
// ignore
}
try {
let exchanges = await timedRunner(resolveMx(domain), 1000);
if (!exchanges || !exchanges.length) {
return;
}
let mx = exchanges
.sort((a, b) => a.priority - b.priority)[0]
.exchange.toLowerCase()
.trim();
let routes = Object.keys(app.config.mxRoutes);
for (let route of routes) {
if (matcher([route], mx)) {
// MX routing match found!
routing.deliveryZone = app.config.mxRoutes[route];
app.logger.info('Main', '%s MXROUTEMATCH recipient=%s mx=%s zone=%s', envelope.id, recipient, mx, app.config.mxRoutes[route]);
return;
}
}
} catch (err) {
// ignore?
app.logger.error('Main', '%s MXROUTEERR recipient=%s error=%s', envelope.id, recipient, err.message);
}
});
// Check if the user can send to yet another recipient
app.addHook('smtp:mail_from', (address, session, next) => {
if (!checkInterface(session.interface)) {
return next();
}
getUser(session, (err, userData) => {
if (err) {
return next(err);
}
if (!userData.recipients) {
// no limits, nothing to check for
return next();
}
ttlcounter('wdr:' + userData._id.toString(), 0, userData.recipients, false, (err, result) => {
if (err) {
return next(err);
}
session.rcptCounter = result;
next();
});
});
});
// Check if the user can send to yet another recipient
app.addHook('smtp:rcpt_to', (address, session, next) => {
if (!checkInterface(session.interface)) {
return next();
}
getUser(session, (err, userData) => {
if (err) {
return next(err);
}
if (!userData.recipients) {
// no limits
return next();
}
let success = session.rcptCounter.success;
let sent = session.rcptCounter.value + ((session.envelope.rcptTo && session.envelope.rcptTo.length) || 0);
let ttl = session.rcptCounter.ttl;
let ttlHuman = false;
if (ttl) {
if (ttl < 60) {
ttlHuman = ttl + ' seconds';
} else if (ttl < 3600) {
ttlHuman = Math.round(ttl / 60) + ' minutes';
} else {
ttlHuman = Math.round(ttl / 3600) + ' hours';
}
}
if (!success || sent >= userData.recipients) {
loggelf({
short_message: '[RCPT TO:' + address.address + '] ' + session.id,
_to: address.address,
_mail_action: 'rcpt_to',
_allowed: 'no',
_daily: 'yes',
_rate_limit: 'yes',
_error: 'daily sending limit reached',
_error_message: 'You reached a daily sending limit for your account' + (ttl ? '. Limit expires in ' + ttlHuman : ''),
_user: userData._id.toString(),
_from: session.envelope.mailFrom && session.envelope.mailFrom.address,
_queue_id: session.envelopeId,
_limit_sent: sent,
_limit_allowed: userData.recipients,
_sess: session.id
});
app.logger.info(
'Sender',
'%s RCPTDENY denied %s sent=%s allowed=%s expires=%ss.',
session.envelopeId,
address.address,
sent,
userData.recipients,
ttl
);
let err = new Error('You reached a daily sending limit for your account' + (ttl ? '. Limit expires in ' + ttlHuman : ''));
err.responseCode = 550;
err.name = 'SMTPResponse';
return setImmediate(() => next(err));
}
loggelf({
short_message: '[RCPT TO:' + address.address + '] ' + session.id,
_user: userData._id.toString(),
_from: session.envelope.mailFrom && session.envelope.mailFrom.address,
_to: address.address,
_mail_action: 'rcpt_to',
_allowed: 'yes',
_queue_id: session.envelopeId,
_limit_sent: sent,
_limit_allowed: userData.recipients,
_sess: session.id
});
app.logger.info('Sender', '%s RCPTACCEPT accepted %s sent=%s allowed=%s', session.envelopeId, address.address, sent, userData.recipients);
next();
});
});
// Check if an user is allowed to use specific address, if not then override using the default
app.addHook('message:queue', (envelope, messageInfo, next) => {
if (!checkInterface(envelope.interface)) {
return next();
}
getUser(envelope, (err, userData) => {
if (err) {
return next(err);
}
ttlcounter('wdr:' + userData._id.toString(), envelope.to.length, userData.recipients, false, (/*err, result*/) => {
// at his point we only update the counter but do not care about the result as message is already queued for delivery
database
.collection('audits')
.find({ user: userData._id })
.toArray((err, audits) => {
if (err) {
// ignore
audits = [];
}
let now = new Date();
audits = audits.filter(auditData => {
if (auditData.start && auditData.start > now) {
return false;
}
if (auditData.end && auditData.end < now) {
return false;
}
return true;
});
let overQuota = userData.quota && userData.storageUsed > userData.quota;
let addToSent = userData.uploadSentMessages && !overQuota && !app.config.disableUploads;
if (overQuota) {
// not enough storage
app.logger.info('Rewrite', '%s MSAUPLSKIP user=%s message=over quota', envelope.id, envelope.user);
if (!audits.length) {
return next();
}
}
if (!addToSent && !audits.length) {
// nothing to do here
return next();
}
let chunks = [
Buffer.from('Return-Path: ' + envelope.from + '\r\n' + generateReceivedHeader(envelope, hostname) + '\r\n'),
envelope.headers.build()
];
let chunklen = chunks[0].length + chunks[1].length;
let body = app.manager.queue.gridstore.openDownloadStreamByName('message ' + envelope.id);
body.on('readable', () => {
let chunk;
while ((chunk = body.read()) !== null) {
chunks.push(chunk);
chunklen += chunk.length;
}
});
body.once('error', err => next(err));
body.once('end', () => {
// Next we try to upload the message to Sent Mail folder
// It doesn't really matter if it succeeds or not so we are not waiting until it's done
setImmediate(next);
// from now on use `return;` to end sequence as next() is already called
let raw = Buffer.concat(chunks, chunklen);
let storeSentMessage = async () => {
// Checks if the message needs to be encrypted before storing it
let messageSource = raw;
if (userData.encryptMessages && userData.pubKey) {
try {
let encrypted = await encryptMessage(userData.pubKey, raw);
if (encrypted) {
messageSource = encrypted;
}
} catch (err) {
// ignore
}
}
try {
let { data } = await addMessage({
user: userData._id,
specialUse: '\\Sent',
outbound: envelope.id,
meta: {
source: 'SMTP',
queueId: envelope.id,
from: envelope.from,
to: envelope.to,
origin: envelope.origin,
originhost: envelope.originhost,
transhost: envelope.transhost,
transtype: envelope.transtype,
time: new Date()
},
date: false,
flags: ['\\Seen'],
raw: messageSource,
// if similar message exists, then skip
skipExisting: true
});
if (data) {
app.logger.info('Rewrite', '%s MSAUPLSUCC user=%s uid=%s', envelope.id, envelope.user, data.uid);
} else {
app.logger.info('Rewrite', '%s MSAUPLSKIP user=%s message=already exists', envelope.id, envelope.user);
}
} catch (err) {
app.logger.error('Rewrite', '%s MSAUPLFAIL user=%s error=%s', envelope.id, envelope.user, err.message);
}
};
let processAudits = async () => {
const messageData = await prepareMessage({
raw
});
if (messageData.attachments && messageData.attachments.length) {
messageData.ha = messageData.attachments.some(a => !a.related);
} else {
messageData.ha = false;
}
for (let auditData of audits) {
const auditMessage = await auditHandler.store(auditData._id, raw, {
date: now,
msgid: messageData.msgid,
header: messageData.mimeTree && messageData.mimeTree.parsedHeader,
ha: messageData.ha,
info: {
source: 'SMTP',
queueId: envelope.id,
from: envelope.from,
to: envelope.to,
origin: envelope.origin,
originhost: envelope.originhost,
transhost: envelope.transhost,
transtype: envelope.transtype,
time: new Date()
}
});
app.logger.verbose(
'Rewrite',
'%s AUDITUPL user=%s coll=%s message=%s msgid=%s dst=%s',
envelope.id,
envelope.user,
'Stored message to audit base',
messageData.msgid,
auditMessage
);
}
};
if (addToSent) {
// addMessage also calls audit methods
storeSentMessage().catch(err =>
app.logger.error('Rewrite', '%s MSAUPLFAIL user=%s error=%s', envelope.id, envelope.user, err.message)
);
} else {
processAudits().catch(err =>
app.logger.error('Rewrite', '%s MSAUPLFAIL user=%s error=%s', envelope.id, envelope.user, err.message)
);
}
});
});
});
});
});
// rewrite MAIL FROM: for messages forwarded by user filter
app.addHook('sender:headers', (delivery, connection, next) => {
// Forwarded header if present
if (delivery.forwardedFor) {
delivery.headers.addFormatted('X-Forwarded-For', delivery.forwardedFor, 0);
}
if (!app.config.srs || !app.config.srs.enabled || !delivery.envelope.from || delivery.interface !== 'forwarder' || delivery.skipSRS) {
return next();
}
let from = delivery.envelope.from || '';
let fromDomain = from.substr(from.lastIndexOf('@') + 1).toLowerCase();
let srsDomain = app.config.srs && app.config.srs.rewriteDomain;
try {
delivery.envelope.from = srsRewriter.rewrite(from.substr(0, from.lastIndexOf('@')), fromDomain) + '@' + srsDomain;
delivery.headers.add('X-Original-Sender', from, Infinity);
} catch (E) {
// failed rewriting address, keep as is
app.logger.error('SRS', '%s.%s SRSFAIL Failed rewriting "%s". %s', delivery.id, delivery.seq, from, E.message);
}
delivery.headers.add('X-Zone-Forwarded-For', from, Infinity);
delivery.headers.add('X-Zone-Forwarded-To', delivery.envelope.to, Infinity);
next();
});
const dkimMarker = new WeakSet();
const connectionHandler = (delivery, next) => {
if (dkimMarker.has(delivery)) {
// do not process DKIM multiple times for the same message
return next();
}
dkimMarker.add(delivery);
if (!delivery.dkim.keys) {
delivery.dkim.keys = [];
}
let from = (delivery.envelope.from || (delivery.parsedEnvelope && delivery.parsedEnvelope.from) || '').toString();
let fromDomain = from.substr(from.lastIndexOf('@') + 1);
let getKey = async domain => {
let keyData;
try {
keyData = await dkimHandler.get({ domain }, true);
} catch (err) {
if (err.code !== 'DkimNotFound') {
throw err;
}
}
if (keyData) {
return keyData;
}
try {
keyData = await dkimHandler.get({ domain: '*' }, true);
} catch (err) {
if (err.code !== 'DkimNotFound') {
throw err;
}
}
if (keyData) {
return keyData;
}
return;
};
getKey(fromDomain)
.then(keyData => {
if (keyData) {
delivery.dkim.keys.push({
domainName: tools.normalizeDomain(fromDomain),
keySelector: keyData.selector,
privateKey: keyData.privateKey
});
}
if (!app.config.signTransportDomain || delivery.dkim.keys.find(key => key.domainName === delivery.zoneAddress.name)) {
return next();
}