Heart Internet may not allow email delivery if your domain's MX records are changed to point to an external spam filtering service. In the past, this has prevented Heart Internet customers from using many spam filtering services, including SpamHero.
Before enabling SpamHero, contact Heart Internet support and ask whether they now allow your domain's MX records to point to a third-party spam filtering service. Specifically, ask whether they will continue accepting final email delivery for your domain after you change your MX records to SpamHero's MX records.
To use SpamHero, your domain's public MX records must point to SpamHero. SpamHero then filters the messages and delivers the clean mail to your destination mail server.
If Heart Internet confirms that they now allow this configuration, you should be able to proceed with the normal SpamHero setup process.
If Heart Internet does not allow this configuration, SpamHero will not be able to filter mail for your domain while Heart Internet remains your destination mail provider. In that case, you would need to either keep your existing Heart Internet MX records or use a different destination mail provider that allows inbound mail from SpamHero.
If you already tried enabling SpamHero before seeing this note, switch your MX records back to their original Heart Internet settings. You can then re-deliver the failed deliveries through the SpamHero control panel after normal delivery has been restored.
If Heart Internet confirms that they now support this type of configuration, please let us know so we can update these instructions.