  The chemical enrichment of X-ray-emitting hot atmospheres has hitherto been
primarily studied in galaxy clusters. These studies revealed relative
abundances of heavy elements that are remarkably similar to Solar. Here, we
present measurements of the metal content of M89 (NGC 4552), an elliptical
galaxy infalling into the Virgo cluster with a $\sim$10 kpc ram-pressure
stripped X-ray tail. We take advantage of deep Chandra and XMM-Newton
observations, and with particular attention to carefully modelling the spectra,
we measure the O/Fe, Ne/Fe, Mg/Fe, Si/Fe and S/Fe ratios. Contrary to previous
measurements in galaxy clusters, our results for the hot atmosphere of M89
suggest super-Solar abundance ratios with respect to iron (i.e. $\alpha$/Fe >
1), similar to its stellar components. Our analysis of the active galactic
nucleus (AGN) activity in this system indicates that the AGN-induced outflow
could have facilitated the stripping of the original galactic atmosphere, which
has been replaced with fresh stellar mass loss material with super-Solar
$\alpha$/Fe abundance ratios. Additionally, we report a new fitting bias in the
RGS data of low-temperature plasma. The measured O/Fe ratios are >1$\sigma$
lower in multi-temperature models than a single temperature fit, leading to
discrepancies in the calculations of supernova fractions derived from the metal
abundances.
