Sync global-autoresponder current state

This commit is contained in:
Marek Miklewicz
2026-07-04 15:16:50 +02:00
parent 196ee224fe
commit af775ce976
47 changed files with 1165 additions and 1037 deletions
+60 -7
View File
@@ -33,9 +33,10 @@ final class AppContext
return $url;
}
public function t(string $key): string
/** @param array<string,string|int|float> $vars */
public function t(string $key, array $vars = []): string
{
return $this->lang->t($key);
return $this->lang->t($key, $vars);
}
public function post(string $key, string $default = ''): string
@@ -70,11 +71,8 @@ final class AppContext
}
}
public function syncActiveBackend(): void
public function syncDirectAdminVacations(): void
{
if ($this->settings->backendMode() !== 'da') {
return;
}
$service = new DirectAdminVacationSyncService(
$this->rules,
new DirectAdminSyncRepository(),
@@ -98,7 +96,7 @@ final class AppContext
echo '<meta name="viewport" content="width=device-width, initial-scale=1">';
echo '<title>' . self::e($this->t($title)) . '</title><style>' . $this->styles() . '</style></head><body>';
echo '<div class="wrap"><div class="breadcrumbs">' . self::e($this->t('Dashboard')) . ' <span>&gt;</span> ' . self::e($this->t('Global autoresponders')) . '</div>';
echo '<header><h1>' . self::e($this->t($title)) . '</h1><p>' . self::e($this->t('Manage automatic replies for account mailboxes')) . '</p></header>';
echo '<header><h1>' . self::e($this->t($title)) . '</h1></header>';
echo '<div class="top-actions"><a class="btn amber' . ($this->action() === 'index' ? ' active' : '') . '" href="' . self::e($this->url('index.html')) . '">' . self::e($this->t('AUTORESPONDERS')) . '</a>';
echo '<a class="btn amber' . ($this->action() === 'create' ? ' active' : '') . '" href="' . self::e($this->url('create.html')) . '">' . self::e($this->t('ADD AUTORESPONDER')) . '</a></div>';
echo '<section class="main-section">' . $alerts . $body . '</section></div>';
@@ -113,6 +111,12 @@ final class AppContext
private function styles(): string
{
$skin = $this->daUser->skin();
if ($skin === 'evolution') {
$base = PLUGIN_ROOT . '/user/enhanced.css';
$override = PLUGIN_ROOT . '/user/evolution.css';
return (is_file($base) ? (string)file_get_contents($base) : '') . "\n" .
(is_file($override) ? (string)file_get_contents($override) : '');
}
$path = PLUGIN_ROOT . '/user/' . $skin . '.css';
if (!is_file($path)) {
$path = PLUGIN_ROOT . '/user/enhanced.css';
@@ -122,14 +126,39 @@ final class AppContext
private function scripts(): string
{
$skin = json_encode($this->daUser->skin(), JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT);
$selectedLabel = json_encode($this->t('Selected'), JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT);
$monthNames = json_encode($this->lang->code() === 'pl'
? ['Styczeń', 'Luty', 'Marzec', 'Kwiecień', 'Maj', 'Czerwiec', 'Lipiec', 'Sierpień', 'Wrzesień', 'Październik', 'Listopad', 'Grudzień']
: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'], JSON_UNESCAPED_UNICODE | JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT);
return <<<JS
(function () {
var pluginSkin = {$skin};
var selectedLabel = {$selectedLabel};
var monthNames = {$monthNames};
function expandDirectAdminPluginContainers() {
if (pluginSkin !== 'evolution') { return; }
var wrap = document.querySelector('.wrap');
if (!wrap) { return; }
wrap.style.width = '100%';
wrap.style.maxWidth = 'none';
wrap.style.marginLeft = '0';
wrap.style.marginRight = '0';
var node = wrap.parentElement;
var guard = 0;
while (node && node !== document.body && guard < 12) {
var id = node.id || '';
var className = typeof node.className === 'string' ? node.className : '';
var matchesDirectAdminContainer = id === 'content' || /(^|\\s)(container|container-fluid|main-content|page-content|content|content-wrapper|main-content-wrapper)(\\s|$)/.test(className);
var computed = window.getComputedStyle ? window.getComputedStyle(node) : null;
if (matchesDirectAdminContainer || (computed && computed.maxWidth && computed.maxWidth !== 'none')) {
node.style.maxWidth = 'none';
node.style.width = '100%';
}
node = node.parentElement;
guard++;
}
}
function pad(value) { return value < 10 ? '0' + value : String(value); }
function updateCanonical(name) {
var date = document.getElementById(name + '_date');
@@ -195,6 +224,11 @@ final class AppContext
document.querySelectorAll('[data-date-value]').forEach(function (btn) {
bindDateButton(btn);
});
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', expandDirectAdminPluginContainers);
} else {
expandDirectAdminPluginContainers();
}
document.querySelectorAll('[data-calendar-picker]').forEach(function (calendar) {
var name = calendar.getAttribute('data-calendar-name');
calendar.querySelectorAll('[data-calendar-prev],[data-calendar-next]').forEach(function (btn) {
@@ -214,6 +248,25 @@ final class AppContext
control.addEventListener('input', function () { updateCanonical(name); });
});
});
document.querySelectorAll('[data-modal-close]').forEach(function (btn) {
btn.addEventListener('click', function () {
var overlay = btn.closest('.br-overlay');
if (overlay) {
overlay.style.display = 'none';
}
document.body.classList.remove('modal-open');
});
});
if (document.querySelector('.br-overlay')) {
document.body.classList.add('modal-open');
}
document.addEventListener('keydown', function (event) {
if (event.key !== 'Escape') { return; }
document.querySelectorAll('.br-overlay').forEach(function (overlay) {
overlay.style.display = 'none';
});
document.body.classList.remove('modal-open');
});
})();
JS;
}
-51
View File
@@ -1,51 +0,0 @@
<?php
declare(strict_types=1);
final class BackendRuntimeConfig
{
public static function sync(Settings $settings, string $backendScript, string $statePath = Settings::CONFIG_DIR . '/backend-state.json', string $errorLog = ''): void
{
$desired = $settings->backendMode();
$current = self::currentBackend($statePath);
if ($current === $desired) {
return;
}
if (!is_file($backendScript) || !is_executable($backendScript)) {
self::log($errorLog, 'Backend script not executable: ' . $backendScript);
return;
}
$process = proc_open([$backendScript, $desired], [['pipe', 'r'], ['pipe', 'w'], ['pipe', 'w']], $pipes);
if (!is_resource($process)) {
self::log($errorLog, 'Could not start backend script.');
return;
}
fclose($pipes[0]);
stream_get_contents($pipes[1]);
$stderr = stream_get_contents($pipes[2]);
fclose($pipes[1]);
fclose($pipes[2]);
$code = proc_close($process);
if ($code !== 0) {
self::log($errorLog, 'Backend script failed with code ' . $code . ': ' . trim($stderr));
}
}
private static function currentBackend(string $statePath): string
{
if (!is_file($statePath)) {
return '';
}
$data = json_decode((string)file_get_contents($statePath), true);
return is_array($data) ? (string)($data['active_backend'] ?? '') : '';
}
private static function log(string $errorLog, string $message): void
{
if ($errorLog === '') {
return;
}
@error_log('[' . date('c') . '] BACKEND_SYNC ' . $message . "\n", 3, $errorLog);
}
}
+62 -17
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@@ -14,22 +14,23 @@ final class DirectAdminUser
throw new InvalidArgumentException('Invalid username');
}
$this->username = $username;
$this->skin = $skin !== '' ? $skin : 'enhanced';
$this->skin = self::normalizeSkin($skin);
$this->language = $language !== '' ? strtolower($language) : 'en';
$this->configDir = $configDir;
}
public static function fromEnvironment(Settings $settings): self
{
$username = getenv('USERNAME') ?: getenv('USER') ?: getenv('DA_USER') ?: '';
if ($username === '' && isset($_SERVER['USERNAME'])) {
$username = (string)$_SERVER['USERNAME'];
}
$username = self::environmentValue(['USERNAME', 'DA_USER', 'USER']);
if ($username === '') {
throw new RuntimeException('Cannot determine DirectAdmin user');
}
$skin = getenv('SKIN') ?: (string)($_SERVER['SKIN'] ?? 'enhanced');
$lang = self::readLanguage($username) ?: $settings->defaultLanguage();
$userConf = self::readUserConf($username);
$skin = self::environmentValue(['SKIN', 'SESSION_SKIN', 'SESSION_SELECTED_SKIN', 'DA_SKIN', 'USER_SKIN', 'THEME']);
if ($skin === '') {
$skin = (string)($userConf['skin'] ?? 'enhanced');
}
$lang = self::languageFromUserConf($userConf) ?: $settings->defaultLanguage();
return new self($username, $skin, $lang);
}
@@ -58,21 +59,65 @@ final class DirectAdminUser
return $settings->defaultEnable();
}
private static function readLanguage(string $username): string
private static function normalizeSkin(string $skin): string
{
$path = '/usr/local/directadmin/data/users/' . $username . '/user.conf';
if (!is_file($path)) {
return '';
$normalizedSkin = strtolower(trim($skin));
if ($normalizedSkin === '') {
return 'enhanced';
}
$lines = file($path, FILE_IGNORE_NEW_LINES);
if ($lines === false) {
return '';
if (str_contains($normalizedSkin, 'evolution')) {
return 'evolution';
}
foreach ($lines as $line) {
if (str_starts_with($line, 'language=')) {
return strtolower(trim(substr($line, 9)));
return $normalizedSkin;
}
/**
* @param list<string> $keys
*/
private static function environmentValue(array $keys): string
{
foreach ($keys as $key) {
$value = getenv($key);
if ($value !== false && trim((string)$value) !== '') {
return trim((string)$value);
}
if (isset($_SERVER[$key]) && trim((string)$_SERVER[$key]) !== '') {
return trim((string)$_SERVER[$key]);
}
}
return '';
}
/**
* @return array<string,string>
*/
private static function readUserConf(string $username): array
{
$path = '/usr/local/directadmin/data/users/' . $username . '/user.conf';
if (!is_file($path)) {
return [];
}
$lines = file($path, FILE_IGNORE_NEW_LINES);
if ($lines === false) {
return [];
}
$data = [];
foreach ($lines as $line) {
$line = trim($line);
if ($line === '' || str_starts_with($line, '#') || !str_contains($line, '=')) {
continue;
}
[$key, $value] = explode('=', $line, 2);
$data[trim($key)] = trim($value);
}
return $data;
}
/**
* @param array<string,string> $userConf
*/
private static function languageFromUserConf(array $userConf): string
{
return strtolower(trim((string)($userConf['language'] ?? $userConf['lang'] ?? '')));
}
}
+1 -4
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@@ -114,7 +114,7 @@ class DirectAdminVacationApi
return [$m[1], $m[2]];
}
if (!preg_match('/^([0-9]{4}-[0-9]{2}-[0-9]{2})\|(morning|afternoon|evening)$/', $value, $m)) {
throw new InvalidArgumentException('DirectAdmin API backend requires exact date-time values');
throw new InvalidArgumentException('DirectAdmin vacation sync requires exact date-time values');
}
$time = ['morning' => '08:00', 'afternoon' => '13:00', 'evening' => $start ? '18:00' : '23:59'][$m[2]];
return [$m[1], $time];
@@ -147,9 +147,6 @@ class DirectAdminVacationApi
/** @param array<string,mixed> $rule */
private function replyOnceTime(array $rule): string
{
if (!empty($rule['reply_every_message'])) {
return '1m';
}
return match ((int)($rule['repeat_minutes'] ?? 1440)) {
1 => '1m',
10 => '10m',
+58 -1
View File
@@ -28,6 +28,40 @@ final class DirectAdminVacationSyncService
}
}
/** @return array<int,array{domain:string,mailbox:string,email:string}> */
public function untrackedNativeVacations(string $username): array
{
$tracked = $this->trackedEmails($username);
$out = [];
foreach ($this->mailboxes->domainsForUser($username) as $domain) {
foreach ($this->api->listVacations($username, $domain) as $local) {
$email = strtolower($local . '@' . $domain);
if (isset($tracked[$email])) {
continue;
}
$out[] = [
'domain' => $domain,
'mailbox' => $local,
'email' => $email,
];
}
}
usort($out, static fn (array $a, array $b): int => strcmp($a['email'], $b['email']));
return $out;
}
/** @param array<int,array<string,mixed>> $entries */
public function deleteNativeVacations(string $username, array $entries): void
{
foreach ($entries as $entry) {
$email = strtolower((string)($entry['email'] ?? ''));
if ($email === '' || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
continue;
}
$this->api->deleteVacation($username, $email);
}
}
/** @return array<string,array<string,mixed>> */
private function rulesById(string $username): array
{
@@ -47,12 +81,20 @@ final class DirectAdminVacationSyncService
$existing = $this->indexedEntries($this->sync->entriesForRule($username, $ruleId));
$targets = $this->targetMailboxes($username, $rule);
$next = [];
$conflicts = [];
foreach ($targets as $mailbox) {
$email = strtolower((string)$mailbox['email']);
$isTracked = isset($existing[$email]);
if (!$isTracked && $this->api->vacationExists($username, $email)) {
throw new RuntimeException('Untracked DirectAdmin vacation already exists for ' . $email);
$conflicts[] = $email;
}
}
if ($conflicts !== []) {
throw new RuntimeException('Untracked DirectAdmin vacation already exists for ' . implode(', ', $conflicts));
}
foreach ($targets as $mailbox) {
$email = strtolower((string)$mailbox['email']);
$isTracked = isset($existing[$email]);
$this->api->saveVacation($username, $email, $rule, $isTracked);
$next[] = [
'rule_id' => $ruleId,
@@ -95,6 +137,21 @@ final class DirectAdminVacationSyncService
return $out;
}
/** @return array<string,bool> */
private function trackedEmails(string $username): array
{
$tracked = [];
foreach ($this->sync->allRuleEntries($username) as $entries) {
foreach ($entries as $entry) {
$email = strtolower((string)($entry['email'] ?? $entry['api_key'] ?? ''));
if ($email !== '') {
$tracked[$email] = true;
}
}
}
return $tracked;
}
/** @param array<string,mixed> $rule @return array<int,array{domain:string,mailbox:string,email:string}> */
private function targetMailboxes(string $username, array $rule): array
{
-43
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@@ -1,43 +0,0 @@
<?php
declare(strict_types=1);
final class MailSender
{
public static function buildMessage(string $from, string $to, string $subject, string $body): string
{
foreach ([$from, $to, $subject] as $value) {
if (str_contains($value, "\r") || str_contains($value, "\n")) {
throw new InvalidArgumentException('Invalid subject or address header');
}
}
$encodedSubject = '=?UTF-8?B?' . base64_encode($subject) . '?=';
$headers = [
'From: ' . $from,
'To: ' . $to,
'Subject: ' . $encodedSubject,
'Auto-Submitted: auto-replied',
'Content-Type: text/plain; charset=UTF-8',
'Content-Transfer-Encoding: 8bit',
];
return implode("\n", $headers) . "\n\n" . str_replace(["\r\n", "\r"], "\n", $body) . "\n";
}
public function send(string $sendmail, string $from, string $to, string $subject, string $body): bool
{
$message = self::buildMessage($from, $to, $subject, $body);
if (!is_file($sendmail) || !is_executable($sendmail)) {
return false;
}
$process = proc_open([$sendmail, '-t', '-i'], [['pipe', 'r'], ['pipe', 'w'], ['pipe', 'w']], $pipes);
if (!is_resource($process)) {
return false;
}
fwrite($pipes[0], $message);
fclose($pipes[0]);
stream_get_contents($pipes[1]);
stream_get_contents($pipes[2]);
fclose($pipes[1]);
fclose($pipes[2]);
return proc_close($process) === 0;
}
}
+1 -1
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@@ -58,7 +58,7 @@ final class MailboxDirectory
}
/** @return string[] */
private function domainsForUser(string $username): array
public function domainsForUser(string $username): array
{
$domains = [];
foreach ($this->domainOwners() as $domain => $owner) {
-31
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@@ -1,31 +0,0 @@
<?php
declare(strict_types=1);
final class MessageClassifier
{
/** @param array<string,string> $headers */
public static function shouldSuppress(array $headers, string $sender): bool
{
$sender = strtolower(trim($sender));
if ($sender === '' || str_starts_with($sender, 'mailer-daemon') || str_starts_with($sender, 'postmaster')) {
return true;
}
$normalized = [];
foreach ($headers as $key => $value) {
$normalized[strtolower(trim($key))] = strtolower(trim($value));
}
if (($normalized['auto-submitted'] ?? 'no') !== 'no') {
return true;
}
if (in_array($normalized['precedence'] ?? '', ['bulk', 'list', 'junk'], true)) {
return true;
}
if (($normalized['list-id'] ?? '') !== '') {
return true;
}
if (str_contains($normalized['content-type'] ?? '', 'delivery-status')) {
return true;
}
return false;
}
}
+18
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@@ -8,6 +8,7 @@ final class PluginLogger
public static function init(string $path): void
{
self::$path = $path;
self::ensureLogFile();
@ini_set('log_errors', '1');
@ini_set('error_log', $path);
@@ -67,4 +68,21 @@ final class PluginLogger
default => 'E_' . $severity,
};
}
private static function ensureLogFile(): void
{
if (self::$path === '') {
return;
}
$dir = dirname(self::$path);
if (!is_dir($dir) || !is_writable($dir)) {
return;
}
if (!is_file(self::$path)) {
@file_put_contents(self::$path, '');
}
if (is_file(self::$path)) {
@chmod(self::$path, 0600);
}
}
}
-48
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@@ -1,48 +0,0 @@
<?php
declare(strict_types=1);
final class RepeatState
{
public function __construct(private string $baseDir = Settings::STATE_DIR, private ?int $now = null)
{
}
public function shouldSend(string $owner, string $ruleId, string $recipient, string $sender, int $repeatMinutes): bool
{
if ($repeatMinutes <= 0) {
return true;
}
$path = $this->path($owner, $ruleId, $recipient, $sender);
if (!is_file($path)) {
return true;
}
$data = json_decode((string)file_get_contents($path), true);
$last = is_array($data) ? (int)($data['last_sent_at'] ?? 0) : 0;
return ($this->time() - $last) >= ($repeatMinutes * 60);
}
public function record(string $owner, string $ruleId, string $recipient, string $sender): void
{
$path = $this->path($owner, $ruleId, $recipient, $sender);
$dir = dirname($path);
if (!is_dir($dir)) {
mkdir($dir, 0700, true);
}
file_put_contents($path, json_encode(['last_sent_at' => $this->time()], JSON_PRETTY_PRINT), LOCK_EX);
@chmod($path, 0600);
}
private function path(string $owner, string $ruleId, string $recipient, string $sender): string
{
if (!preg_match('/^[A-Za-z0-9._-]+$/', $owner)) {
throw new InvalidArgumentException('Invalid owner');
}
$hash = hash('sha256', implode('|', [$owner, $ruleId, strtolower($recipient), strtolower($sender)]));
return rtrim($this->baseDir, '/') . '/replies/' . $owner . '/' . $hash . '.json';
}
private function time(): int
{
return $this->now ?? time();
}
}
+21 -14
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@@ -29,8 +29,16 @@ final class RuleValidator
];
/** @param array<string,mixed> $input @return array<string,mixed> */
public static function validate(array $input, Settings $settings): array
public static function validate(array $input, Settings $settings, bool $allowPastSchedule = false): array
{
$name = trim(str_replace(["\r\n", "\r", "\0"], ["\n", "\n", ''], (string)($input['name'] ?? '')));
if (str_contains($name, "\n")) {
throw new InvalidArgumentException('Nazwa autorespondera nie może zawierać nowych linii.');
}
if (strlen($name) > 255) {
throw new InvalidArgumentException('Nazwa autorespondera jest za długa.');
}
$subjectPrefix = trim((string)($input['subject_prefix'] ?? $input['subject'] ?? ''));
if (str_contains($subjectPrefix, "\r") || str_contains($subjectPrefix, "\n")) {
throw new InvalidArgumentException('Przedrostek tematu nie może zawierać nowych linii.');
@@ -52,15 +60,22 @@ final class RuleValidator
$tz = new DateTimeZone($settings->timezone());
[$startTs, $startValue] = self::parseScheduleValue((string)($input['start_value'] ?? ''), $mode, $tz, true);
[$endTs, $endValue] = self::parseScheduleValue((string)($input['end_value'] ?? ''), $mode, $tz, false);
if (substr($startValue, 0, 10) < (new DateTimeImmutable('today', $tz))->format('Y-m-d')) {
throw new InvalidArgumentException('Data rozpoczęcia nie może być wcześniejsza niż aktualna data.');
if (!$allowPastSchedule) {
$today = (new DateTimeImmutable('today', $tz))->format('Y-m-d');
if (substr($startValue, 0, 10) < $today) {
throw new InvalidArgumentException('Data rozpoczęcia nie może być wcześniejsza niż aktualna data.');
}
if (substr($endValue, 0, 10) < $today) {
throw new InvalidArgumentException('Data zakończenia nie może być wcześniejsza niż aktualna data.');
}
}
if ($endTs <= $startTs) {
throw new InvalidArgumentException('Data zakończenia musi być późniejsza niż data rozpoczęcia.');
}
[$replyEveryMessage, $repeatMinutes] = self::parseReplyFrequency((string)($input['reply_frequency'] ?? '1440'), $settings);
$repeatMinutes = self::parseReplyFrequency((string)($input['reply_frequency'] ?? '1440'));
return [
'name' => $name,
'subject_prefix' => $subjectPrefix,
'body' => $body,
'schedule_mode' => $mode,
@@ -70,24 +85,16 @@ final class RuleValidator
'start_ts' => $startTs,
'end_ts' => $endTs,
'enabled' => self::truthy($input['enabled'] ?? false),
'reply_every_message' => $replyEveryMessage,
'repeat_minutes' => $repeatMinutes,
'dynamic_scope' => $settings->dynamicMailboxScope(),
];
}
/** @return array{0:bool,1:int} */
private static function parseReplyFrequency(string $value, Settings $settings): array
private static function parseReplyFrequency(string $value): int
{
$value = trim(strtolower($value));
if ($value === 'every') {
if ($settings->backendMode() === 'da') {
throw new InvalidArgumentException('Częstość odpowiedzi jest nieprawidłowa.');
}
return [true, 0];
}
if (isset(self::REPLY_FREQUENCIES[$value])) {
return [false, self::REPLY_FREQUENCIES[$value]];
return self::REPLY_FREQUENCIES[$value];
}
throw new InvalidArgumentException('Częstość odpowiedzi jest nieprawidłowa.');
}
-10
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@@ -6,7 +6,6 @@ final class Settings
public const BASE_DIR = '/usr/local/hitme_plugins/global-autoresponders';
public const CONFIG_DIR = self::BASE_DIR . '/config';
public const DATA_DIR = self::BASE_DIR . '/data';
public const STATE_DIR = self::BASE_DIR . '/state';
public const LOG_DIR = self::BASE_DIR . '/logs';
public const AUDIT_LOG = self::LOG_DIR . '/audit.log';
public const EXTERNAL_SETTINGS = self::CONFIG_DIR . '/plugin-settings.conf';
@@ -51,7 +50,6 @@ final class Settings
'DEFAULT_PLUGIN_LANGUAGE' => 'pl',
'DEFAULT_ENABLE' => 'true',
'GLOBAL_AUTORESPONDER_TIMEZONE' => 'Europe/Warsaw',
'GLOBAL_AUTORESPONDER_BACKEND' => 'da',
'GLOBAL_AUTORESPONDER_DYNAMIC_MAILBOX_SCOPE' => 'true',
'GLOBAL_AUTORESPONDER_MAX_SUBJECT_BYTES' => '255',
'GLOBAL_AUTORESPONDER_MAX_BODY_BYTES' => '20000',
@@ -91,11 +89,6 @@ final class Settings
return $this->getString('GLOBAL_AUTORESPONDER_TIMEZONE', 'Europe/Warsaw');
}
public function backendMode(): string
{
return $this->getString('GLOBAL_AUTORESPONDER_BACKEND', 'da');
}
public function scheduleMode(): string
{
return 'exact_hour';
@@ -141,9 +134,6 @@ final class Settings
} catch (Throwable) {
throw new InvalidArgumentException('Invalid timezone: ' . $this->timezone());
}
if (!in_array($this->backendMode(), ['da', 'exim'], true)) {
throw new InvalidArgumentException('Invalid backend mode: ' . $this->backendMode());
}
if ($this->maxSubjectBytes() < 1 || $this->maxBodyBytes() < 1) {
throw new InvalidArgumentException('Invalid size limits');
}