/usr/share/doc/postfix/QMQP_README is in postfix-doc 2.9.6-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | PPoossttffiixx qqmmaaiill aanndd eezzmmllmm ssuuppppoorrtt
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This document will be made available via http://www.postfix.org/.
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