Note that RBLs are not foolproof, and often result in false positives. Additional RBLs can be added using the link, at left. You can choose to use the two default RBLs individually or collaboratively. If you enable an RBL and the sender's host is in the list, their e-mails will be rejected. RBLs are Real-Time Blacklists containing IP addresses that have been known to send large quantities of spam. Mail contains more conditions that can be checked before an e-mail message is sent.
You'll see more SpamAssassin settings later. Use the options under Filters to adjust attachment filtering and SpamAssassin filters. The Domains and IPs settings let you control which domain names and IP addresses the server will use to send mail. Explicitly denying access in a similar fashion is known as blacklisting.Īs you can see, the first three options are enabled by default and cannot be disabled.Įach option in this section has an link which can optionally be used to whitelist or blacklist a host or IP address, as described. With the Access Lists, you can explicitly allow certain hosts access to your SMTP server, even if they trigger your security measures. These settings affect blacklisting, spam control, and other security-related issues. The first group of settings contains Access Control Options. Checking or unchecking certain settings on this page will activate or deactivate those settings (and others).Įach option here lists a brief description that should help you determine its purpose a longer description is accessible by clicking the question mark link next to the option.Īll of the options should be left as the defaults unless you have good reason to change them. You probably noticed that some of the options faded out as soon as the page loaded. Also, be sure that your server's settings stay secure by not compromising them with unnecessary changes.Įxim, the only outgoing mail (SMTP) server available for cPanel/WHM, has a sizeable list of settings you can change to your liking.ġ) Its configuration page can be found under Service Configuration. To prevent spam from being sent through your server, you'll need to keep a watchful eye on your server's mail logs and statistics. Relaying spam is against the Terms of Service of most reputable hosting providers, so it is your responsibility to ensure that your server is not exploited. If your server is insecure, it's very likely to be exploited by spammers at some point in time. Having a secure SMTP server is very important. Click here to see the article as a Video Tutorial!