Gmail will let you attach emails to emails

The new Gmail feature is quite interesting and weird to hear. Gmail will now allow users to attach emails to emails. After the launch of this feature, users will not need to download and attach emails.

In order to use this feature, users have to drag and drop one or more emails into the compose window. In addition, users can also select the Forward as an attachment from the three-dot menu.
Usually, users prefer to forward emails rather than attach emails, but occasionally attaching emails is more useful than forwarding. For example, this option is best if users want to send multiple emails on the same topic in one email.
Files that are attached to emails are attached in the form of .eml extensions. Users who receive the file can open it in their custom email client. This feature has been started from today. It will be enabled for all users by January 21st.