Domain Setup

Here you can find instructions on how to set up your MX records for inbound email delivery

Email Account Setup

After adding your domain to our system, you'll need to point it to our mail servers:

Required DNS Record

TypeNameValueTTL
MX@mx.smtp.dev3600

Setup Instructions

Log in to your domain/DNS provider's website

Find the DNS settings or Domain management section

Create a new MX record with exactly the values shown above

Please Note

DNS changes don't propagate instantly - it could take anywhere from a few minutes to 24+ hours depending on your DNS provider. If you've just updated MX records, expect spotty email delivery until propagation completes. Some providers like Cloudflare are pretty quick (usually a few minutes).

Using Subdomains

Your root domain isn't your only option - subdomains work perfectly with our system too!

Subdomain Email Setup

TypeNameValueTTL
MXtestmx.smtp.dev3600
MXsupportmx.smtp.dev3600

In this example, both test.example.com and support.example.com would be configured to receive email.

Why Use Subdomains?

Subdomains are perfect for:

  • Separating different departmens (notifications, support, billing)
  • Testing new email configurations without risking your main domain reputation
Each subdomain must be added separately before configuring its MX records. For example, to use support.example.com and billing.example.com, you need to add both domains individually in your dashboard.

Setting Up a Subdomain

Let's say you want emails to arrive at help@support.example.com:

Add the subdomain in dashboard

Go to the Domains section of your dashboard and add support.example.com as a new domain

Configure DNS for the subdomain

Add an MX record for your subdomain:

TypeNameValueTTL
MXsupportmx.smtp.dev3600

Create a new Account

Create a new account and select the support.example.com as the domain name

Wait for DNS propagation

Once DNS propagation completes, you can receive emails at any address @support.example.com

Troubleshooting

If emails aren't arriving after updating your MX records:

Verify your DNS configuration

Check your MX setup using Google's DNS Toolbox by entering your domain name. This tool will confirm if your MX record is correctly configured and visible across the internet.

Ensure single MX record configuration

Your domain should have only one MX record pointing to mx.smtp.dev. Multiple or competing MX records will interfere with proper mail delivery. Remove any existing MX records from previous email providers before adding ours.

If problems persist, please contact our support team for additional assistance.