Hello Cezanne,
Only people with the encryption key (receipient) can see the encrypted e-mail:
When you need to protect the privacy of an email message, encrypt it. Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text. Only the recipient who has the private key that matches the public key used to encrypt the message can decipher the message for reading.
Therefore, if you got this e-mail from a website, then you will need the key to see what is in the message. You should speak to the original sender.
If this is helpful please accept answer.