if I send any email from Pepipost (https://pepipost.com/) to Zoho Mail all of the email arrives as plain text not TLS. Previously I used API method and currently using SMTP method (Port 25, Encryption TLS) but both have this issue.

If I send any email from Pepipost to any ESP's all of the email arrives as TLS. This is seriously odd and strange.

Is there anyone who can look into this deeply? 😔