Custom Exim Filter Examples

4.2 / 5 ( 9 votes ) cPanel 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:”…

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Resolving MS15-055 on cPanel Servers

4.7 / 5 ( 12 votes ) If 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…

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Configure Email Client Shows Wrong SSL Hostname

4.6 / 5 ( 8 votes ) CPanel 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…

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Implementing Mandrill with Exim on cPanel

4.7 / 5 ( 21 votes ) Mandrill 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…

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Exim Privilege Escalation in 4.69-23

The 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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