If you are accessing this page, then you have most likely sent me an email but got an error message that looked a little bit like this (important parts in boldface):
This is the Postfix program at host [somewhere]
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
<nikolaus@rath.org>: host ebox.rath.org[85.214.16.64] said: 550 Rejected spam,
visit http://www.rath.org/mail_err for help. (in reply to end of DATA
command)
The reason for this is that my computer made a mistake: It wrongly identified your email as an unwanted mass email ("spam"). I will correct this error as soon as possible, but right now I don't even know that a mistake has happened. For this reason I would kindly ask you to send your mail again, but this time including the following text somewhere in your message:
##ebox.rath.org: NOSPAM##
This will make sure that your email reaches me immediately. I will
then take the necessary actions to prevent similar mistakes in the
future (and of course also handle the actual content of the mail).
Thank you very much for your understanding.