This guide explains how to set up email services. If you also need to connect web hosting to Active24, follow the instructions in How to Connect an Externally Registered Domain to Our Hosting.
If your domain is registered elsewhere or its DNS is managed by another provider, you can still use Active24 email services with it. You do not need to transfer the domain to us.
To direct email traffic to our servers, update the DNS records wherever your domain’s DNS zone is currently managed.
Tip: If you are unsure where your domain’s DNS is managed, you can check its current nameservers using a tool such as DNSChecker. The nameservers will show you which provider manages the DNS records you need to update.
Which MX records should you configure?
To receive emails, configure the following two MX records:
MX 1
- Value: mx10.active24.cz
- Priority: 10
- TTL: 600
MX 2
- Value: mx20.active24.cz
- Priority: 100
- TTL: 600
The available priority values may vary depending on your DNS provider. What matters is their relative order: mx10.active24.cz must have a lower priority value than mx20.active24.cz.
For example, you can use priorities 10 and 20 instead of 10 and 100, provided that you keep them in the correct order.
SPF record
To specify which servers may send emails on behalf of your domain, also configure SPF as a TXT record:
- Value: v=spf1 a mx include:_spf.websupport.cz ?all
- TTL: 600
Each domain should have only one SPF record.
If you also use another service to send emails in addition to Active24, do not create a second SPF record. Instead, combine all permitted services into a single SPF record.
For example, if you use both Active24 and another provider, the resulting record could look like this:
v=spf1 a mx include:_spf.websupport.cz include:_spf.another-provider.com -all
Always check the documentation for the service you use to send emails to find the exact value you need to add to your SPF record. This could be your email provider or another tool used to send messages. If necessary, contact the provider’s support team.
For better email deliverability, we also recommend configuring DKIM in addition to SPF.
DKIM adds a digital signature to your messages. This allows the recipient’s server to verify that the message came from an authorised server and that its contents were not changed after it was sent. It therefore helps prevent sender identity spoofing.
You can find detailed instructions in our Improving Email Deliverability – SPF, DKIM and DMARC guide, under How to Set Up DKIM.