Attempt to improve the reply messages formatting

Hi folks, 

With this patch, replying to this message: 
```
hello 

world
```

Will generate the following one:
```


BM-XXXXX wrote: 
> hello 
> 
> world
```

What do you think about it? 
Like for old emails, it makes replying to a message part by part much more convenient IMO. 

Thanks.