From 1835, Edgar Allan Poe was working as a literary critic for
The Southern Literary Messenger.
Poe's magazine was to be called Penn Magazine (Poe was working
in Philadelphia at the time) and then it was changed to The Stylus.
Poe issued a prospectus for it in 1840, but never was able to raise
sufficient capital to publish even one issue so the magazine never
came to fruition.
The Southern Literary Messenger was not "Poe's magazine." It
belonged to Thomas W. White. Poe left it in 1837.