From Hushmail: Hello,
Thank you for contacting us.
Not to worry, the Hushmail servers have already been patched to prevent
the Heartbleed vulnerability. For our response on this you can see the
following page:
https://help.hushmail.com/entries/51243087-Update-on-the-Heartbleed-bug

To be 100% safe it is always good practice to update your passphrase
after something like this as well. To do so please follow these steps:  
1. Sign in to your account.
2. Click Preferences in the upper right of the screen
3. Next to the 'Passphrase' option click on the ***********  
4. Enter your old passphrase and click 'Continue'
5. Type your new passphrase in the first and second boxes then click save

If we can be of any other assistance just let us know