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Mail queue - Recipient domain MX validation before sending

This commit is contained in:
wrongecho 2025-11-06 16:58:18 +00:00
parent d25017216a
commit 891f71006b
1 changed files with 8 additions and 3 deletions
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11
cron/mail_queue.php
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@ -215,6 +215,7 @@ if (mysqli_num_rows($sql_queue) > 0) {
$email_content = $rowq['email_content'];
$email_ics_str = $rowq['email_cal_str'];
// Check sender
if (!filter_var($email_from, FILTER_VALIDATE_EMAIL)) {
$email_from_logging = sanitizeInput($rowq['email_from']);
mysqli_query($mysqli, "UPDATE email_queue SET email_status = 2, email_attempts = 99 WHERE email_id = $email_id");
@ -225,10 +226,14 @@ if (mysqli_num_rows($sql_queue) > 0) {
mysqli_query($mysqli, "UPDATE email_queue SET email_status = 1 WHERE email_id = $email_id");
if (!filter_var($email_recipient, FILTER_VALIDATE_EMAIL)) {
// Check recipient
$domain = sanitizeInput(substr($email_recipient, strpos($email_recipient, '@') + 1));
if (!filter_var($email_recipient, FILTER_VALIDATE_EMAIL) || !checkdnsrr($domain, 'MX')) {
mysqli_query($mysqli, "UPDATE email_queue SET email_status = 2, email_attempts = 99 WHERE email_id = $email_id");
$email_to_logging = sanitizeInput($email_recipient);
$email_subject_logging = sanitizeInput($rowq['email_subject']);
logApp("Cron-Mail-Queue", "Error", "Failed to send email: $email_id due to invalid recipient address. Email subject was: $email_subject_logging");
logApp("Cron-Mail-Queue", "Error", "Failed to send email: $email_id to $email_to_logging due to invalid recipient address. Email subject was: $email_subject_logging");
appNotify("Mail", "Failed to send email #$email_id to $email_to_logging due to invalid recipient address: Email subject was: $email_subject_logging");
continue;
}
@ -273,7 +278,7 @@ if (mysqli_num_rows($sql_queue) > 0) {
/** =======================================================================
* RETRIES: status = 2 (Failed), attempts < 4, wait 30 min
* NOTE: Backoff is `email_failed_at <= NOW() - INTERVAL 30 MINUTE`
* ======================================================================= */
* =======================================================================*/
$sql_failed_queue = mysqli_query(
$mysqli,
"SELECT * FROM email_queue