How can I customize the emails going to the subscribers

I am using subscription widget. Can I customize the format of Email.
Like frankly, Can I put Advertisement!??

I’m afraid that’s not possible. You can customize the contents of the emails since they include the contents of your posts, but you cannot customize their format; the subscription emails are sent from WordPress.com servers, and as such you do not have much control over their design.

Alright Herve.

So cannot change format. Roger.

you said I can Customize Content.
So can you Please tell me that How can I put Adcode(JavaScript) before Or after the Content ?

Javascript code will be stripped from your post content when you publish your posts, so I’m afraid you won’t be able to push such ads to your email subscribers.

You could, however, limit the amount of content sent to your subscribers, thus inviting them to visit your site to view the whole post content. And there, you’ll be able to use an advertising plugin to inject ads into the post content.

There are 2 ways to limit the amount of content sent to your subscribers:

• If you go to Settings > Reading in your dashboard, you can change your Feed Settings to “Summary”. Once you save your changes, all subscription emails will only include an excerpt of your post, with a link to continue reading on the site.
• If your Feed settings are set to “Full Post”, you can split the content of each one of your blog posts in 2 parts thanks to the More tag:
  <!--more-->

  Everything that is above the More tag will appear on your home page and in the subscription emails, followed by a link inviting users to click to continue reading; everything that is below that tag will only appear on the post’s page.

  You can read more about it here:
  https://en.support.wordpress.com/splitting-content/more-tag/