Hi, on 18.12.23 um 23:15 Steffen Nurpmeso wrote via Postfix-users:
|> X-Google-Original-From:[email protected] | |By Google. Exactly what their algorithm is for it is not known. The "X-" |prefix is the clue: it's an experimental or local-use header. Note that the X- prefix is deprecated by RFC 6648 from 2012: Deprecating the "X-" Prefix and Similar Constructs in Application Protocols
That's the headline of the RFC, but from my reading of the RFC text in RFC6648 they only deprecated the X- naming convention due to issues when migrating non standardized headers to standardized headers after years or decades of use.
But there is no reason not to use the X- prefix for very site specific headers, like the X-Google- one above in the RFC.
The RFC IMHO addresses more the requirement of the X- prefix at least for headers that could possibly get standardized in future.
Kind regards Lars -- Lars Kollstedt Telefon: +49 6151 16-71027 E-Mail:[email protected] man-da.de GmbH Dolivostraße 11 64293 Darmstadt Sitz der Gesellschaft: Darmstadt Registergericht: Amtsgericht Darmstadt Handelsregisternummer: HRB 9484 Geschäftsführer: Andreas Ebert
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