DKIM has duplicate options

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1

Hi team

The dkim_data.toml config is :

[base]
selector = "xxxdkim"
headers = [
  "From", "Reply-To", "Subject", "Date", "To", "Cc",
  "Resent-Date", "Resent-From", "Resent-To", "Resent-Cc",
  "In-Reply-To", "References", "List-Id", "List-Help",
  "List-Unsubscribe", "List-Subscribe", "List-Post",
  "List-Owner", "List-Archive"
  ]
over_sign = true

When send the eml is :

DKIM-Signature: v=1; a=rsa-sha256; d=edm.raise3d.com; s=dmddkim; c=relaxed/relaxed;
    bh=Id2QP77RzPlin/m3+NSnFDcF1bJOyiKxDo1UT4qR5lg=;
    h=from:from:reply-to:subject:subject:date:date:to:to:cc:resent-date:
        resent-from:resent-to:resent-cc:in-reply-to:references:list-id:list-help:
        list-unsubscribe:list-subscribe:list-post:list-owner:list-archive;
    t=1749114466;
    b=g6duvFcNrblSdNQm0lkaVxJlz3mIYrALzGGkpNHwxvALOQ5H1079bOyJrWqFUIGgqjT2gvCye
    24ji1/mzrSj3oWiCmZJux4tnBMVMXApY5ZjIV9LgHM8MDFXuotAbaRyiH55UVRmB3kDk5vIIIJA
    Qd2ci7YbXBOvZQ64pars71E=;

These are from:from:reply-to:subject:subject​:date:date:to:to:cc:resent-date: Some duplicates, is this normal?

3

You said to over-sign, it over-signed. It’s a security practice to prevent attackers adding an additional header.

4

I’m so stupidddddd, I need to read more documents. Thank you so much