I got the spanish translation file from a partial translation on the official wordpress plugin page.
The problem is that any of the other translations are working.
For example, the italian language translation which is included in the plugin, it wont work either, if I change wordpress language to italian, post smtp will still show in english, the same happens with any language file.
Hi!
I’m using spanish spain, but It wont change to any language, not even the ones that are included with plugin.