What to do when I post serious Usenet messages but some user/s hassle by subject changing my post to “SPAM”?

Question by interactive_net: What to do when I post serious Usenet messages but some user/s hassle by subject changing my post to “SPAM”?
I post on unmoderated Usenet groups. Not only the specific user/s change subject line, they also say “SPAM” only on message body. What can I say on the Usenet when this victimisation happens?
I post on unmoderated Usenet groups serious message that are relevant and I believe generically useful. Not only the specific user/s change subject line, they also say “SPAM” only on message body. What can I say on the Usenet when this victimisation happens?

Best answer:

Answer by sifatb
One way may be to contact with the webmaster and sent him some screenshots as attachment which you posted and unfortunately marked as spam. They should take necessary actions.

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