It is shown that the Szegő projection
S
S
of a smoothly bounded domain
Ω
\Omega
, not necessarily pseudoconvex, satisfies local regularity estimates at certain boundary points, provided that condition
R
R
holds for
Ω
\Omega
. It is also shown that any biholomorphic mapping
f
:
Ω
→
D
f:\Omega \rightarrow D
between smoothly bounded domains extends smoothly near such points, provided that a weak regularity assumption holds for
D
D
.