EXHIBIT 23.3
CONSENT OF INDEPENDENT ACCOUNTANTS
We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated March 22, 2004 relating to the financial statements of MyDocOnline, Inc., which appears in Zix Corporation’s Current Report on Form 8-K/A, Amendment 1, dated April 14, 2004. We also consent to the reference to us under the heading “Experts” in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Florham Park, New Jersey
January 10, 2005