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q : qmailadmin@inter7.com 10 March 2009 • 7:40AM -0400

[qmailadmin] autorespond as a spamrelay
by Lendvai Péter

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Dear List,

I think, that the way qmailadmin handels the the vacation/autorespond is
not safe.

Since autorespond sends back per default the original message as well, it
can be used as a spam relay.

When the spammer fakes the From: field, autorespond will send the respond
and the original spam to the faked address. This way a mail server can be
used to spread spam.

I was looking for a way to set the autorespond flag 1 (default) to 0, but
did not find anything on google.

Please correct me if I am wrong.

When I am not wrong, this could be handled as:
- feature request (ability to turn off appending the original mail to the
vacation reply)
- security vulnerability report.

If there is a way to change this behaviour in a working system please let
me know.

Thank you,
best regards,
Peter Lendvai

!DSPAM:49b59aee32683388343877!

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