Pretty Good Privacy (PGP) - Recommended

As our primary contact method, ESD recommends that any email contact be securely established using PGP - a secure method of transferring encrypted email messages through normal email protocols. The email portion of PGP is free for personal use. The PGP website can be found here.
PGP users can take advantage of secure email to ESD's general account (info@esd-australia.com) by using the ESD key which can be found here.

Email via Hushmail

An option for those users who prefer flexible web-based email, ESD suggests the free Hushmail secure webmail service - a method of transferring encrypted email messages through normal email protocols similar to a server-based instance of PGP. Email from a hushmail address to esd-australia@hushmail.com will be secure from end-to-end.
Users can signup for free by clicking the image below.

Please be aware that users should only use the Java Client, not the generic web interface, due to recent incidents of information disclosure to US federal authorities.