While the number of magazines publishing Christian fiction has shrunk lately, a few are still around and open to submissions from writers. Here are the ones I know of.
Havok (speculative fiction)
The Untold Podcast (speculative fiction)
Splickety (general fiction, including historical)
TWJ (all genres, including speculative)
Ancient Paths (most genres, including some speculative)
TRC (all genres, including speculative)
Clubhouse (children's, open to some speculative)
Clubhouse, Jr. (children's, general fiction)
Kids' Ark (children's, open to some speculative)
Also,
the Splickety Blog, while not a magazine, publishes stories in all genres, including speculative.
Do you know of any other Christian fiction magazines?