[SaF] posting anonymously to a newsgroup

[Ravi Kumar]

Hi folks,
   I would like to know if it is possible to post anonymously on to a
newsgroups. I know that some mail clients and remailers hide the source
of the mails. I would like to either use one of these servers(location?
and usage? ) or use a user friendly service (web interface to anonymous
posting) to post to a newsgroup.

By the way, can the free services be relied upon to guarantee posting to
the usenet. Are there any commercial services that provide the same
service.

TIA,
ravi