Our free tools for Mac OS X Server Mail Services – spamtrainer and mailbfr – have been downloaded more than 100’000 times and are helping system administrators looking after Mac OS X Servers from 10.3 to 10.13.


Our free tutorials and whitepapers related to Mac OS X Server Mail and Web Services have been downloaded more than 500’000 times. The tutorials are available for a wide range of topics and for Mac OS X Server versions from 10.4 to 10.13.


While we are happy to provide free support through our Tutorials, FAQs and the occasional e-mail advice, it cannot replace personalised support. A professional can fix in a matter of hours what could take you days of trial and error.

Where is the crontab file located for spamtrainer?

spamtrainer uses the root crontab. You can either edit it directly or use spamtrainer -i to add/remove the cron job.

Can I buy support?

Well, yes and no. If you have a question which is strictly related to any of our tools, we normally will help you out for free. For any other kind of support related to Mac OS X Server we do offer professional consultancy services. You can get more information on this page

Why are you telling me this?

Unfortunately, there are many users who believe that by downloading a free tool they are also entitled to free support. As long as they need support for personal use or a small business this is fine. However, we find ourselves increasingly in a situation where people pretend free support while at the same time charging […]

Am I entitled to free support?

No, but if you ask nicely and your question is related to one of our free tools, chances are you will get an answer.

Are the tools free?

Yes. For time being the tools and tutorials are free for personal and commercial use. Depending on how much burden this puts on our time and wallet, this may or may not change over time.

Rejecting virtual mail users before the content-filter on OS X Server

A short tutorial on how to modify your postfix confguration so that unknown virtual mail users get rejected before content-filtering. By Athanasios Alexandrides NOTE: This document is deprecated. Instructions have been incorporated into the tutorial Making Virtual Mail Users in Mac OS X Server


Take advantage of our mail server checkup service. For a flatrate of $50 (€38) we will run a full diagnostic of your mail server, report on its status, and make recommendations for improvements. If you would like us to check your mail server or need more information, please use our contact form.