Getting emails from the future is a classic sign of SPAM. Unfortunately, SpamAssassin only bumps the score of these emails by less than 2 points, which isn’t usually enough to get it marked as SPAM. To fix this, you can add a rule to SpamAssassin to block emails from the future. First, open /etc/mail/spamassassin/local.cf in…
Read morecPanel allows you to easily create custom Exim filters by simply dropping the rules in /usr/local/cpanel/etc/exim/sysfilter/options/ and running: /scripts/buildeximconf service exim restart Here are a couple useful examples of filters we’ve created for our customers: Prevent email delivery to certain domains: if (“$h_to:, $h_cc:” contains “@domain.com”) or (“$h_to:, $h_cc:” contains “@domain.com”) then fail text “Emails to…
Read moreIf you’re a hosting provider with cPanel servers that were set up prior to version 11.46, you may be hearing from customers using Outlook ever since MS15-055 was released by Microsoft on May 12. This most recent Outlook upgrade prevents the software from connecting to a POP or IMAP server that uses DH keys that are…
Read moreCPanel allows you to install a shared SSL certificate for email services so your users can connect securely to POP, IMAP, and SMTP. The only real drawback here is that you can only natively use one certificate, which means your users should be connecting to the correct hostname under which the SSL certification is installed from…
Read moreMandrill is a transactional email service run by MailChimp, comparable to SendGrid. It comes stock with a powerful API for fast implementation into applications for sending email reliably over SMTP, but it can also be used as a smart host for all of your server’s outgoing email. The below instructions cover how to do this…
Read moreUpdated 3/9/21 Setting up your cPanel server to send through a third-party mail server is very easy to do, if you understand the basics of how cPanel builds its Exim configs. You never want to edit your exim.conf file directly – your changes will be wiped out any time a cPanel update runs or someone…
Read moreUpdate: This feature is automatically enabled as of cPanel 11.36.1.4 If you have RBL’s enabled globally on your server, there may be times when you want to keep certain domains from having their mail scanned against an RBL. While cPanel supports excluding sender IP addresses from these checks, some manual Exim modifications are needed to…
Read moreWith spam continuing to be an increasing problem, hosting providers are always looking for ways to filter out junk so their customers remain as spam free as possible. SpamAssassin, the anti-spam software bundled with cPanel, will do a sufficient job in filtering some spam, but to truly get bragging rights as a spam-free host, you…
Read moreNote: It is mentioned in the comments that recent versions of cPanel include an Email Archiving feature that stores copies of email on the server for you. If this is what you’re trying to do, this feature is probably the better option. However, if you’re trying to forward copies of outgoing email to other addresses, the…
Read moreThe cPanel security team found an issue in Exim that can potentially allow a user on the system to potentially run commands as the root user. Luckily, cPanel has already released a patch which is available for immediate download via their Exim upgrade script. If your system is set to update cPanel automatically, you may…
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