Seems like for now it is possible to just truncate an incoming email by configured regular expression.
Sometimes clients add inline comments into email so simple truncating is not very safe and we can lose some important data.

Would not it be a good idea to add possibility not to just truncate but truncate + put what has been truncated into {{ collapse}} block.

So the comments will look short because will show only the main part of the email (as for now)
and the other(for now truncated) will be added into 表示隠す

and will be collapsed by default.
so any time we can open the collapsed data and check the full email.

Thank you.