Fixes #2407, Fixes #3003 - Mac Mail inline PDF destroys E-Mail-Body

app/models/channel/email_parser.rb

@@ -600,11 +600,27 @@ process unprocessable_mails (tmp/unprocessable_mail/*.eml) again
   end
 
   def message_body_hash(mail)
-    message = [mail.html_part, mail.text_part, mail].find { |m| m&.body.present? }
+    if mail.html_part&.body.present?
+      content_type = mail.html_part.mime_type || 'text/plain'
+      body = body_text(mail.html_part, strict_html: true)
+    elsif mail.text_part.present?
+      content_type = 'text/plain'
 
-    if message.present? && (message.mime_type.nil? || message.mime_type.match?(%r{^text/(plain|html)$}))
+      body = mail
-      content_type = message.mime_type || 'text/plain'
+        .all_parts
-      body = body_text(message, strict_html: content_type.eql?('text/html'))
+        .reduce('') do |memo, part|
+          if part.mime_type == 'text/plain' && !part.attachment?
+            memo += body_text(part, strict_html: false)
+          elsif part.inline? && part.content_type&.start_with?('image')
+            content_type = 'text/html'
+            memo += "<img src=\'cid:#{part.cid}\'>"
+          end
+
+          memo
+        end
+    elsif mail&.body.present? && (mail.mime_type.nil? || mail.mime_type.match?(%r{^text/(plain|html)$}))
+      content_type = mail.mime_type || 'text/plain'
+      body = body_text(mail, strict_html: content_type.eql?('text/html'))
     end
 
     content_type = 'text/plain' if body.blank?
@@ -685,6 +701,7 @@ process unprocessable_mails (tmp/unprocessable_mail/*.eml) again
   def get_attachments(file, attachments, mail)
     return file.parts.map { |p| get_attachments(p, attachments, mail) } if file.parts.any?
     return [] if [mail.text_part&.body&.encoded, mail.html_part&.body&.encoded].include?(file.body.encoded)
+    return [] if file.content_type&.start_with?('text/plain') && !file.attachment?
 
     # get file preferences
     headers_store = {}