Scott Kitterman via Postfix-users wrote in <53d75fd8-e109-4712-ba9c-4ea07aa2b...@kitterman.com>: |On April 29, 2024 9:27:20 PM UTC, Steffen Nurpmeso via Postfix-users \ |<postfix-users@postfix.org> wrote: |>Tim Coote via Postfix-users wrote in |> <d7c84b22-180c-4e2f-bd0b-3bb5c7d29...@coote.org>: ... |>|That’s why I formed a hypothesis that (my) Postfix had changed this \ |>|long header - as you note this is < 998 stmp limit. I presume it’s \ |>|not directly involved now, as smtp_line_length_limit is the default (998) ... |>Note that in practice only exim and the DKIM library it uses (from |>2009) produce really standard-conforming results, all other |>implementations i have tested have some edge cases. For example, |>opendkim and rspamd (as of git) use (at least in pars, or always) |>the C function isspace(3) to normalize whitespace, which is not |>allowed according to the DKIM RFC. They all do it wrong. The |>most minimum and in practice very likely non-failing (or not at |>all) is dkimpy (which uses the python function trim(), but only as |>the very last step). My upcoming sign-only milter will only |>support relaxed/relaxed, but is hard-conforming, too. | |If you have examples of cases where dkimpy is wrong, please file bugs \ |or email me off list. It aims to support the RFC requirements with \ |only minimal tweaks for interoperability.
I did not want to insult you! In mind i had these canon..py snippets def strip_trailing_whitespace(content): return re.sub(b"[\t ]+\r\n", b"\r\n", content) def compress_whitespace(content): return re.sub(b"[\t ]+", b" ", content) ... (x[0].lower().rstrip(), compress_whitespace(unfold_header_value(x[1])).strip() + b"\r\n") for x in headers] These strip()s remove any whitespace, as opposed to [\t ] only. --steffen | |Der Kragenbaer, The moon bear, |der holt sich munter he cheerfully and one by one |einen nach dem anderen runter wa.ks himself off |(By Robert Gernhardt) _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org