“tmptitle” what’happen?

Hello everyone, I’m Alberto and I’m new to this forum.
I recently installed and activated this plugin (Postie) on my WordPress site. The first “email-to-post” arrived correctly according to my configuration settings:

• category: “Articles”
• status: “pending”
  You can see the published post here: https://suoviaggio.com.br/artigo/dia-dos-pais-seis-dicas-para-aproveitar-o-final-de-semana-da-data-em-monte-verde-mg/
  After that, however, I haven’t been able to receive any actual “email-to-post” entries; instead, I get empty posts—or a series of empty posts—based on the scheduled update times. I published one as an example: https://suoviaggio.com.br/noticias/tmptitle/
  (PS: To avoid confusion on the site, I published the post with the year 2020 and assigned it to the “News” category, which didn’t exist at the time.)
  The category is also incorrect; all posts are automatically assigned to the “Digital Magazines” category, which is the site’s default category.
  The configuration is correct, and the test passes without errors. What could have happened?
  I chose the following method for publishing emails as posts:
• emails arrive in a specific mailbox
• all emails are forwarded to the mailbox configured in Postie, while I keep a copy in the original mailbox (the first and only successful post used this method)
• the post should be placed in the “Articles” category with a “draft/pending” status, ready for review, editing, and approval
• only administrators can approve and publish the post
  I am using a professional theme, and these types of posts are published using a “post type builder” (the first post also used this system).
  My mail server is Hostinger, and it handles third-party IMAP connections without issues.
  Can anyone help me understand or resolve this? Thank you for your kind attention.

The page I need help with: [log in to see the link]