Email Address Encryption During Message Processing (FF1)

Overview

Every email address has two parts: a part before the "@" symbol, and a part after it. For example, in [email protected]:

• john.doe is called the local part. Think of it as the "username" part of the address.
• example.com is the domain. This is the part after the "@", usually the company or email provider name.

When Netcore processes your email (before it actually reaches the recipient), we temporarily scramble the local part of each address using a method called FF1 encryption. This adds an extra layer of protection while the message is being prepared. Right before the email actually goes out, we unscramble it back to the original address. So the recipient always gets the email at their real, correct address. Nothing changes for them.

What gets protected

We protect the local part (the "username" part) of every email address in these fields:

• To
• CC
• BCC
• Reply-To

The domain (the part after "@") is never changed.

Example

Workflow

1. We find every email address in the To, CC, BCC, and Reply-To fields.
2. We take just the local part (the part before "@") of each address.
3. We scramble that local part using FF1 encryption.
4. We leave the domain (the part after "@") untouched.
5. We use these scrambled addresses to prepare your message for sending.
6. Right before the email actually goes out, we unscramble the local part back to normal.
7. The email is sent to the real, original address.

What this means for you

• You don't need to do anything. This protection happens automatically in the background.
• Your emails are delivered as normal. Recipients get your message at their real email address, exactly as before.
• Nothing else changes. This only affects how addresses are handled temporarily during processing. The rest of your email sending works the same way it always has.

Frequently asked questions

Q. Do I need to change how I add recipients?

A. No. You add To, CC, BCC, and Reply-To addresses exactly the way you always have.

Q. Will my recipients ever see a scrambled or strange-looking address?

A. No. The address is unscrambled before the email is sent, so recipients only ever see the normal, correct address.

Q. Does this affect the domain part of the address (the part after "@")?
A. No. Only the local part (before "@") is temporarily scrambled. The domain always stays the same.

Q. What is FF1 encryption, in simple terms?

A. It is a way of scrambling data so it can't be read while it's being processed, but it keeps the same length and format as the original. This lets our systems handle it smoothly without any errors, and then reverse it back to normal before the email is sent.