One can navigate to (WHM >> Home >> Email >> Greylisting) for proper working on this feature. Greylisting is for cPanel and WHM version 64. One needs to navigate to (Home >> Email >> Greylisting) interface for properly configuring it.
This interface allows one to configure Greylisting, protects one’s server against unwanted email or spam. The mail server temporarily rejects any email from a sender that is not recognized by a server. The originating server tries to send it again after a delay in case it is a legitimate email. The server accepts the email after some time.
Greylisting identifies incoming email by triplets which is a collection of three pieces of data, that is, the IP address, the sender’s address, and the recipient’s address. Greylisting filters spam, allows legitimate email a second chance to pass through by delaying the unknown triplets.
One can access the Greylisting Configuration Settings, Trusted Hosts, and Reports sections of the interface. But before that, one must click on or off so as to enable the Greylisting feature.
This interface displays only an On/ Off toggle if Greylisting is disabled on the server. One can click on the toggle to change it to On and enable Greylisting.
This tab specifies common mail providers where greylisting will not delay mail.
The proper mail arrives from well-known mail service providers. To ensure that Greylisting’s role in delaying this mail, one can choose to rely upon these mail providers with a few clicks rather than entering their IP addresses into the Trusted Hosts list.
Some mail services like Google Apps™, allow customers owning their domains to relay email through their mail servers. If there is a trust with the mail providers, Greylisting will not delay this mail, even if those customers’ domains did not properly configure the SPF records for their mail service.
One can select Automatically trust newly added mail providers in order to trust new mail providers added to this list.
In order to select or deselect Trust and Auto Updatefor all of the mail providers, one can click on the gear icon there on the top right of the list.
cPanel helps in maintaining the list of common mail providers based on current mail server statistics. One can read our Common Mail Service IP Addresses list to see the IP addresses associated with the common mail providers.
This feature can be used by the users with certain technical steps as reviewed in the article.