Most of the major email clients not showing up the ALT text used when images failed to load. I've followed all the emailer standards, and also tried to style the alt tag. No success! Is there a workaround for this? or does it mainly depends on the email engine?

Below is the sample tag which I use while developing HTML mailers

<img src="img/logo.png" alt="logo" width="72" height="15" style="display: block; border: 0; outline: 0;"/>