Your mailserver sends an answer when a mail cannot be delivered
Sometimes this is not usefull and should be disabled
To prvent backscatter from your mailserver you edit the master.cf and find the line with
bounce unix - - y - 0
at the end of the line you add the word discard.
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About the Author
Author: Wim Peeters - Keskon GmbH & Co. KG
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience, including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform.
Latest update: 11/01/2021 | Comment: