Question: Having some doubts on the importing the strict mode in my login application. If i enable this in my code,

```
   StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);

```

will the security features in my login weakened? Or I should just use the async task?

Answer: 
There's simply no reliable way to launch the user's mail reading client from HTML.

As has been pointed out, you *could* craft a `mailto` link, but all that will do is load the mail *sending* application that the user has selected for that browser. Applications are able to register themselves as able to handle `mailto` links, but those applications are not necessarily the same applications that are going to receive mail. For example, you can ask Gmail to take over `mailto` links in many browsers. 

Even then, consider that the user might not be using a desktop mail client to read their mail. They could be on a mobile device, or not using their normal computer, or could use a webmail interface.

Simply telling the user to read their mail should be enough instruction for anyone.
Use this:

```
<a href="mailto:someone@something.com" >Your text</a>

```