Customs email headers and/or subjects tags

simon · 2022 年1 月 8 日 01:03

我没有在代码的任何地方看到类似 %{optional_tags} 的内容会被替换到 email custom headers 站点设置中添加的标头里。我发现的是这个用于设置自定义标头值的方法：

lib/email/sender.rb

main


      
                 SiteSetting.secure_uploads_max_email_embed_image_size_kb.kilobytes
              return
            end
            true
          end
          
          #
          # Two behaviors in the mail gem collide:
          #
          #  1. Attachments are added as extra parts at the top level,
          #  2. When there are both text and html parts, the content type is set
          #     to 'multipart/alternative'.
          #
          # Since attachments aren't alternative renderings, for emails that contain
          # attachments and both html and text parts, some coercing is necessary.
          #
          # When there are alternative rendering and attachments, this method causes
          # the top level to be 'multipart/mixed' and puts the html and text parts
          # into a nested 'multipart/alternative' part.
          #
          # Due to mail gem magic, @message.text_part and @message.html_part still

它被调用自：

github.com/discourse/discourse

lib/email/sender.rb

main


      
            # to the array of values for the header.
            @message.header[key] = nil
            @message.header[key] = our_value
          end
          
          value = header_value(key)
          
          # Remove Auto-Submitted header for group private message emails, it does
          # not make sense there and may hurt deliverability.
          #
          # From https://www.iana.org/assignments/auto-submitted-keywords/auto-submitted-keywords.xhtml:
          #
          # > Indicates that a message was generated by an automatic process, and is not a direct response to another message.
          @message.header[key] = nil if key.downcase == "auto-submitted" && smtp_group_id
          
          # Replace reply_key in custom headers or remove
          if value&.include?("%{reply_key}")
            # Delete old header first or else the same header will be added twice
            @message.header[key] = nil
            @message.header[key] = value.gsub!("%{reply_key}", reply_key) if reply_key.present?
          end

我将尝试从 Discourse 团队获取更多关于该设置预期用途以及可以替换到自定义标头中的值的详细信息。

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Customs email headers and/or subjects tags

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