Letters with replies are getting lost somewhere, although the action is triggered: Switch to stage if letter received

Action triggered: Switch to stage if letter received. [file]23857[/file] [file]23858[/file] But it seems that the letters themselves with responses from the lead are not returned. [file]23857[/file] [file]23858[/file] Because they can't be found anywhere: [file]23857[/file] [file]23858[/file] - not in spam [file]23857[/file] [file]23858[/file] - not in the cart [file]23857[/file] [file]23858[/file] - not in the inbox [file]23857[/file] [file]23858[/file] Please tell me how to fix it? [file]23857[/file] [file]23858[/file] [file]23857[/file] [file]23858[/file] [file]23857[/file] [file]23858[/file]