On 2026-01-28 18:05:34 -0500, Derek Martin wrote: > [...] > Messages which have paragraphs in the body which start with From > should do one of: > > 1. escape that From (ONLY if preceded by a newline) > 2. Use the Content-Length header to mark where the message ends > 3. Use quoted-printable encoding or some other well-known and > well-supported encoding to alleviate the need to escape the > "\nFrom " line. > > If your MDA writes messages to folders without doing one of those > three things, it will fail to interoperate with well-written, robust > mailers. Mutt should not care about that.
(1) was probably acceptable in the past, but escaping such a "From " is unacceptable in attachments. And anyway, the MDA also needs to support the Content-Length header in order not to break it by the other methods, and also ensure that it is correct before copying the message to a mbox file (before that, this header is not used). -- Vincent Lefèvre <[email protected]> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)
