  Using the Schwinger-Dyson equations the possible infrared behaviour of the
gluon propagator is studied. Previous work performed in axial gauges is
reviewed, the approximations needed detailed and the difficulties of their
justification discussed. We then turn to the Landau gauge and investigate the
possibility of a gluon propagator less singular than $1/p^{2}$ when $p^{2}
\rightarrow 0$. We find that this infrared softened behaviour of the gluon
propagator is inconsistent; only an infrared enhanced gluon, as singular as
$1/p^{4}$ when $p^{2} \rightarrow 0$ is consistent with the truncated
Schwinger-Dyson equation. The implications for confinement and for the
modelling of the Pomeron are discussed.
