Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of Rock-Tenn Company (the “Corporation”), for the year ended September 30, 2014, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Steven C. Voorhees, Chief Executive Officer of the Corporation, and Ward H. Dickson, Chief Financial Officer of the Corporation, each certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)        The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)        The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

/s/ Steven C. Voorhees

Steven C. Voorhees

Chief Executive Officer

November 21, 2014

/s/ Ward H. Dickson

Ward H. Dickson

Chief Financial Officer

November 21, 2014