courses take place here
Open Source Training: (gleicher Kurs auf deutsch)

amavis against spam & viruses

Email for advanced learners

Email is an indispensable part of corporate communication. If you want to rely on email in a professional context, you will want to keep out spam, viruses and other kinds of unwanted content while still sending and receiving email without hindrance. The standard settings of Postfix, amavis (amavisd-new) and SpamAssassin are practical but do not account for individual requirements of performance and throughput.

During this training course, postmasters will learn how to operate email services professionally. You will get to know which possibilities you have in order to run email service in a stable, highly availalble and secure way and which system architecture will suit your individual requirements optimally.

After a week of concentrated practice training, conducted by email expert Patrick Ben Koetter, you will be able to judge against the background of spam hysteria, which hardware you (do not) need, how to filter incoming mail traffic optimally according to your requirements, absorb load peaks and also how to get your outgoing mail traffic delivered reliably.


5 days, 2,161.00 € + 19% vat = 2,571.59 €

Full eight clock hours per day, complete set of literature, WiFi, complimentary notebook, full board, drinks (selected wines are charged separately), pastries, homemade cakes, sauna, social program

Extended/reduced amenities on demand:

Surcharge per guest night in two bed rooms (spacious and comfortable rooms) 59.00 € + 7% vat = 63.13 €per night
Surcharge per guest night in the Linuxhotel-flat share 83.00 € + 7% vat = 88.81 €per night
Surcharge per guest night in single rooms (depending on availabity, early reservation recommended) 129.00 € + 7% vat = 138.03 €per night
Reduction for half board instead of full board accomodation -29.41 € + 19% vat = -35.00 €per day
Reduction w/o social program -8.40 € + 19% vat = -10.00 €per evening

Tax deductibility * Terms of cancellation


Please select your favourite reservation date


Patrick Ben Koetter is an experienced long term Postfix specialist. He is the co-author of the world wide best-selling book "The Book of Postfix" (in german "Postfix - Einrichtung, Betrieb und Wartung", writer of numerous articles and actively involved in the Open Source community with projects like amavisd-new, Python, mailman, Postfix, Cyrus SASL, x-arf and many more. As a consultant for high end email systems he is nationally and internationally well renowned at computing centres, public institutions, banks and ISPs.

prerequisites for attending

Prerequisites are thorough understanding of mail servers comparable to the level of our Postfix mail server training as well as basic knowledge of Linux network administration comparable to the level of our Advanced Linux administration training.

If you feel uncertain on this point, we look forward to assist you via email or phone.

Course contents

Position reckoning

Viruses, spam & co revisited

Filtering methods

Efficient email policy design

Correct sizing

Connection filter

SMTP session filter

Content filter

Amavisd-new in practice

Content filter "SpamAssassin"



Course schedule

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