Hello, Claws Mail inserts a non-standard header for Newsgroups: X-Newsreader: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) The RFC recommends User-Agent: instead of X-Newsreader: ftp://ietf.org/rfc/rfc5536.html#section-3.2.13 Is there anything against to change that behavior in Claws Mail? -- kind regards Marco