Recent Posts

Zimbra split horizon DNS on EC2 with Unbound

Email server behind NAT is a pain, but it can be further aggravated if your email server has a dynamic IP address. Which is the case with EC2. Granted, it will only change on stop/start of the instance, but still. Here’s a recipe to deal with it (a kludge, of course):

Speeding up Ansible

Ansible playbook execution may take quite a while when connection is not configured properly. Here’s a checklist to ensure your Ansible is as fast as possible:

Centos 7 Exim DKIM

Centos 7 has Exim 4.84 in repos, which has DKIM support built-in. So no need for OpenDKIM anymore. See how is it configured: