Yes, a domain can have multiple MX records. In fact, most professionally managed email systems use multiple records to ensure reliability. When you set up email for your domain, you aren’t limited to a single point of failure; you can provide a primary destination and several backups in case your main mail server is temporarily unavailable or undergoing maintenance.
Quick Summary: Using Multiple MX Records
| Feature | Reality |
|---|---|
| Is it allowed? | Yes, absolutely. |
| Why use them? | Redundancy and failover protection. |
| How to prioritize? | Use the “Priority” value (lower number is higher priority). |
| What to watch out for? | Misconfigured priority levels or slow secondary servers. |
How Multiple MX Records Work
When someone sends an email to an address at your domain, their mail server performs a DNS lookup. It asks the internet for your domain’s MX (Mail Exchange) records. If you have only one record, the sending server tries that one address.
If that server is down, the email delivery fails or is delayed.
By configuring multiple MX records, you provide a list of options. The sending server tries the record with the lowest priority number first. If that server does not respond or refuses the connection, the sending server automatically moves to the next record in the list, which acts as a backup or secondary mail server.
This is a standard practice for maintaining stable connectivity and communication across your digital infrastructure.
The Role of Priority Numbers
Every MX record consists of two parts: a destination hostname and a priority value. The priority value is an integer, typically starting at 0, 10, or 20.
A lower number means a higher priority. For example, if you have a record with a priority of 10 and another with a priority of 20, the sending server will always try the record with 10 first. It only reaches out to the server associated with the 20-priority record if the first one is unreachable.
It is perfectly fine to assign the same priority number to multiple records. If two records share the same priority, the sending server will treat them as equally valid, essentially load-balancing the incoming mail between them. This approach is common when you want to distribute traffic across a cluster of email servers to prevent any single machine from being overwhelmed.
When to Use Multiple Records
You might wonder if you actually need more than one record. If you are using a major provider like Google Workspace or Microsoft 365, they often specify exactly what your MX records should look like. In these cases, you should follow their documentation exactly, even if they provide multiple records.
They handle the load balancing and uptime on their end.
If you are running your own mail server or using a specific email service, multiple records are helpful in the following scenarios:
- Failover Protection: You have a main server and a secondary server that queues mail until the primary one comes back online.
- Load Balancing: You have multiple servers intended to process mail simultaneously to manage high volume.
- Provider Requirements: Your hosting company may provide a primary and a secondary relay to ensure consistent messaging delivery.
Common Mix-ups and Things People Get Wrong
There is a fair amount of confusion regarding how DNS handles email. Understanding these common myths can save you from delivery issues.
Mix-up 1: Thinking multiple records cause conflicts.
Many users worry that having more than one MX record will confuse the sending server and cause emails to bounce. In reality, the DNS protocol is specifically designed to handle this list. As long as your priority numbers are set correctly, the system works as intended.
Mix-up 2: The “TTL” misunderstanding.
Some people assume that changing the order of MX records or adding new ones happens instantly. This is not true. DNS changes depend on the TTL (Time To Live) setting.
It can take anywhere from a few minutes to several hours for the rest of the internet to recognize your new configuration. If you are having issues, such as a persistent 500 internal server error that you think is related to DNS, always check your DNS propagation status before assuming the server settings are wrong.
Mix-up 3: Confusing A Records with MX Records.
An A record points a domain or subdomain to an IP address, while an MX record points specifically to a mail server. You should never use an IP address directly in an MX record. You must always use a hostname (like mail.yourdomain.com).
What This Means for You
If you are currently setting up your email, take a moment to look at your provider’s documentation. They will explicitly tell you whether to set up one record or several. If you are managing your own servers, adding a backup record with a higher priority number is a simple way to improve your resilience.
Ensuring your email records are configured correctly is just as important as choosing a reliable host. If you find your current setup is frequently failing or if you’re struggling to balance your email hosting needs, it might be time to look for a more robust solution.
Get started with Hostinger today at 85% OFF with code hHostCouponHub
Frequently Asked Questions
Does having multiple MX records slow down my email delivery?
No. Properly configured MX records do not slow down delivery. The sender only attempts the secondary records if the primary one fails.
Since this is an automated process, the impact on speed is negligible compared to the benefit of having a backup.
Should I use the same priority number for all records?
You can, but it is usually better to use different numbers to create a clear order of operations. Using the same number is generally reserved for load-balancing setups where multiple servers are equally capable of handling all incoming traffic.
Can I use multiple MX records from different hosting providers?
Technically yes, but this is a bad idea. If you use a Google Workspace record and a separate generic hosting record, you will have “split-brain” delivery where some emails land in one inbox and some in another. Stick to one provider’s set of records to ensure your inbound mail arrives consistently.
What happens if all my MX records point to servers that are down?
If all servers associated with your MX records are unavailable, the sending server will typically queue the email and try again periodically, often for up to 24 to 48 hours. If the servers remain unreachable, the sender will eventually receive a “bounce” message indicating the delivery failed. Always ensure your primary mail server is stable to avoid this outcome.
Final Thoughts
Managing your domain’s DNS can feel technical, but understanding MX records is a fundamental part of the process. Whether you need a single record for a simple setup or a series of prioritized entries for high availability, the principles remain the same. Start by checking your provider’s requirements, and if you ever need to migrate your services, ensure you have the right hosting plan in place to support your needs.
Claim your discount at Hostinger and get your email running smoothly →
This page contains affiliate links. If you purchase through the links or coupon code on this page, we may earn a commission, at no extra cost to you.
