Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
Haggerty Kelly P

(Last) (First) (Middle)
SUITE 2200


(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Vice President
3. Date of Earliest Transaction (Month/Day/Year)
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 04/28/2018 F 6,081 D $4.96 153,230 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
/s/ Noah F. Webster, Attorney-in-Fact 10/05/2018
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
Know all by these presents, that the undersigned 
hereby constitutes and appoints 
Noah F. Webster, signing singly, the 
Undersigned's true and lawful attorney-in-fact to:
(1)	execute for and on behalf of the undersigned,
in the undersigned's capacity as an officer and/or 
director of Zix Corporation (the Company), Forms 3, 4, 
and 5 in accordance with Section 16(a) of the Securities 
Exchange Act of 1934, as amended, and the rules thereunder;
(2)	do and perform any and all acts for and on behalf of 
the undersigned which may be necessary or desirable to 
complete and execute any such Form 3, 4, or 5 and 
timely file such form with the United States Securities
and Exchange Commission and any stock exchange or 
similar authority; and
(3)	take any other action of any type whatsoever
in connection with the foregoing which, in the opinion
of such attorney-in-fact, may be of benefit to, in the
best interest of, or legally required by the undersigned,
it being understood that the documents executed by 
such attorney-in-fact on behalf of the undersigned 
pursuant to this Power of Attorney shall be in such 
form and shall contain such terms and conditions as 
such attorney-in-fact may approve in such 
attorney-in-facts discretion. The
 undersigned hereby
grants to such attorney-in-fact full power and 
authority to do and perform any and every act and
thing whatsoever requisite, necessary, or proper to be 
done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as
the undersigned might or could do if personally present,
with full power of substitution or revocation, hereby 
ratifying and confirming all that such attorney-in-fact,
or such attorney-in-facts substitute or substitutes,
shall lawfully do or cause to be done by virtue of
this power of attorney and the rights and powers herein
The undersigned acknowledges that the foregoing 
attorney-in-fact, in serving in such capacity at the
request of the undersigned, is not assuming, nor is
the Company assuming, any of the undersigned's 
responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934, as amended.
This Power of Attorney shall remain in full force 
and effect until the undersigned is no longer required
to file Forms 3, 4, and 5, with respect to the 
undersigned's holdings of and transactions in 
securities issued by the Company, unless earlier 
revoked by the undersigned in a signed writing 
delivered to the foregoing attorney-in-fact.
IN WITNESS WHEREOF, the undersigned has caused 
this Power of Attorney to be executed as of this 
5th day of June, 2018.
/s/ Kelly P. Haggerty
Print Name: Kelly P. Haggerty