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E+A galaxies are believed to be a short phase connecting major merger ULIRGswith red and dead elliptical galaxies. Their optical spectrum suggests amassive starburst that was quenched abruptly, and their bulge-dominatedmorphologies with tidal tails suggest that they are merger remnants. AGN-drivenwinds are believed to be one of the processes responsible for the suddenquenching of star formation and for the expulsion and/or destruction of theremaining molecular gas. Little is known about AGN-driven winds in thisshort-lived phase. In this paper we present the first and unique sample of poststarburst galaxy candidates with AGN that show indications of ionized outflowsin their optical emission lines. Using IRAS-FIR observations, we study the starformation in these systems and find that many systems selected to have poststarburst signatures in their optical spectrum are in fact obscured starbursts.Using SDSS spectroscopy, we study the stationary and outflowing ionized gas. Wealso detect neutral gas outflows in 40\% of the sources with mass outflow rates10--100 times more massive than in the ionized phase. The mean mass outflowrate and kinetic power of the ionized outflows in our sample ($\dot{M}\sim 1\,\mathrm{M_{\odot}/yr}$, $\dot{E}\sim 10^{41}\, \mathrm{erg/sec}$) are largerthan those derived for active galaxies of similar AGN luminosity and stellarmass. For the neutral outflow ($\dot{M}\sim 10\, \mathrm{M_{\odot}/yr}$,$\dot{E}\sim 10^{42}\, \mathrm{erg/sec}$), their mean is smaller than thatobserved in (U)LIRGs with and without AGN.

Multi-phase outflows in post starburst E+A galaxies -- I. General sample properties and the prevalence of obscured starbursts