Why MX Records are mandatory

MX (Mail Exchange) records are a crucial part of email communication, as they ensure that your domain can send and receive emails properly. If your MX records are not verified, you may encounter several issues that can negatively affect your email deliverability and domain reputation. Below are some potential problems that can occur if your MX records are not set up or verified:

1. Inability to Receive Emails
   Without MX records, your domain won’t be able to receive incoming emails. If you’re not allowing incoming mail, recipient mail servers will notice this issue, which could harm your domain’s reputation. This could signal to others that you’re not supporting two-way communication, which might raise concerns about the legitimacy of your domain.

2. Undelivered Bounce-Back Messages
   If users are unable to receive emails due to their own firewall settings or if the emails are being flagged as spam, the recipient's mail server will typically attempt to send a bounce-back message. However, without proper MX records, this bounce-back message will not be delivered to you. This can further impact your domain’s reputation, as recipient servers like Google or Hotmail may view this as an email misconfiguration and could flag your domain as unreliable.

3. Risk of Being Flagged by Spam Filters
   Spam filters from major email services (like Google, Hotmail, and Yahoo) rely on the presence of valid MX records to verify that a domain is properly configured for email communication. Without verified MX records, your domain may be flagged as suspicious, increasing the chances of being blacklisted. This could severely hinder your ability to send legitimate emails, leading to delivery failures and decreased email engagement.

4. Negative Impact on Deliverability
   Email service providers (ESPs) use MX records to route email traffic. If they cannot find valid MX records for your domain, they may reject your emails outright. Even if your email is not flagged as spam, the absence of verified MX records makes it difficult for ESPs to ensure that your domain is trustworthy. This can lead to a lower inbox placement rate and higher chances of your emails being marked as spam.

How to Resolve These Issues

To avoid these problems, it’s essential to verify your MX records. Here’s the recommended solution:

• Verify MX Records for Your Sub-domain: By verifying the MX records for your sub-domain, you’ll allow proper routing of incoming and outgoing emails for that sub-domain without needing to verify the main domain directly.

  This verification process ensures that your domain is configured correctly for email communications, which helps maintain your reputation, improves email deliverability, and ensures that emails can be sent and received smoothly.