SpamExperts (1 of 11) - An overview

SpamExperts is our dedicated spam filtering cluster that inspects all incoming email.

Accessing SpamExperts

cPanel > Email > SpamExperts

On the next screen you will see a list of domains within this cPanel account - click Login to enter the SpamExperts configuration for that domain

SpamExperts is only available when you use Krystal Hosting for your email.

Depending on where your domain is registered and your website hosted you may need to alter different parts of the SpamExperts system to ensure your mail is filtered correctly and reaches your mailbox.

To ensure your domain's email is being filtered, your MX records should point to Krystal's MX servers. This is the case whether your domain is registered with Krystal Hosting or not, so you will need to do this at your domain registrar or wherever you manage your DNS. By default, new domains purchased from Krystal are configured with the correct settings.

Krystal's mail servers are:

(or mx1 & or mx1 &

These mail servers pass all inbound email to Krystal's SpamExperts cluster, where it is scanned before being passed on to your cPanel server where the messages are routed into your individual mailboxes.

Every cPanel account enjoys customised settings for SpamExperts to help adapt it to your specific requirements.

In the scenario where all your Services (Domain, Hosting, Email) are with Krystal Hosting then SpamExperts should work for you with no additional configuration.

If you've just moved to Krystal Hosting, then your DNS records may not yet be set correctly. You can follow our guides on setting your domains nameservers and How to configure MX records and local/remote mail routing in cPanel guide to complete this task.

Then you should check that the correct SpamExperts Destination is configured to direct scanned email to your cPanel server. This guide also applies if you host your website elsewhere.

SpamExperts is a very intelligent spam filtering service using many factors to determine if an incoming message is safe, including

  • Greylisting - This is a technique that presents the sending mail server with a special test that most spam servers will fail. More information on Greylisting is available in this SolarWinds article (external link opens in a new window).
  • Real time black lists (RBLs) - SpamExperts inspects publicly available black lists of known spammy servers.
  • Content analysis - SpamExperts inspects the contents of the email messages including attachments to determine if the message is spam.
  • SPF and DKIM testing - SPF and DKIM are advanced opt-in techniques used by many mail servers to authenticate outgoing email. SPF relies on the DNS system to identify which mail servers are authorised to send email. DKIM (DomainKeys Identified Mail) uses cryptographic techniques to "sign" outgoing mail. More details on how to set DKIM & SPF up on your Smart Hosting can be found here.

You can learn more about using and configuring SpamExperts by reading these articles:

SpamExperts (2 of 11) - How to configure MX records and local/remote mail routing in cPanel

SpamExperts (3 of 11) - Configuring mail destinations for correct mail delivery

SpamExperts (4 of 11) - Clearing the call-out cache

SpamExperts (5 of 11) - Filter settings

SpamExperts (6 of 11) - Checking your Spam Quarantine

SpamExperts (7 of 11) - Checking your delivery logs

SpamExperts (8 of 11) - Whitelisting and Blacklisting senders and recipients

SpamExperts (9 of 11) - Creating SpamExperts logins

SpamExperts (10 of 11) - Ways to manage spam

SpamExperts (11 of 11) - How to disable SpamExperts filtering

How did we do?

Powered by HelpDocs (opens in a new tab)
© Krystal Hosting Ltd 2002–