Limit outgoing emails and enable SMTP authentication

Every server owner deals with spam, which leads to the IP address of the server being blocked. One way to get around this is to restrict the amount of emails that the dedicated server sends out.

Use root to access the WHM on your server. Navigate to Main >> Server Configuration >> Adjust Parameters. See “Max hourly emails per domain” if you can. It is the most emails that a domain is allowed to send in a single hour. It is set to infinite by default, which carries a significant danger. You can select the desired radio station by clicking the button just beneath it. You are done when you click “Save.” Every domain can receive 500 emails every hour with our shared hosting services.

This will limit the emails being sent from somemailaccount@domain.com. But, there are scripts which send emails using nobody@hostname.com OR cPaneluser@domain.com. This is possible using scripts in php, perl etc. To overcome this, you need to enable SMTP Authentication. SMTP AUTH as the name says, is a method to send emails using authentication mechanism. Email won’t be sent using a script if it is not authenticated with correct Username & Password.

To enable it, you need to add php mail to disable function in php.ini. Doing this, every user who uses a contact form OR script to send emails, will need to enable SMTP AUTH in the scripts. Contact any of our support representatives, & they will assist you with enabling it.

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