When you manage email on a cPanel server, you eventually face the classic Exim bottleneck:one misbehaving domain can clog the queue and grind mail delivery to a halt for everyone else. Picture this: a compromised account starts blasting out spam, or a single domain’s messages are all soft-bouncing at Outlook or Yahoo. Suddenly, your […]
Per-Domain Mail Queues in Exim Read Post »
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
How to Block Emails From the Future Using SpamAssassin In cPanel Read Post »
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:” contains “@domain.com”) then fail text “Emails to
Custom Exim Filter Examples Read Post »
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 server that uses DH keys that are
Resolving MS15-055 on cPanel Servers Read Post »
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 which the SSL certification is installed from
Configure Email Client Shows Wrong SSL Hostname Read Post »
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 below instructions cover how to do this
Implementing Mandrill with Exim on cPanel Read Post »
Updated 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
Implementing SendGrid with Exim on cPanel Read Post »
Update: 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
Exclude Domains from RBL Checks for Incoming Email Read Post »
With 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
Enhancing Your cPanel SPAM Protection with SpamExperts Read Post »
