Digitally signed email iphone

To digitally sign an email on an iPhone, you'll need to use the Apple Mail app and set up your email account to use S/MIME (Secure/Multipurpose Internet Mail Extensions) encryption. Here's a step-by-step guide:

Prerequisites:

1. You have an iPhone with iOS 11 or later.
2. You have an email account set up on your iPhone (e.g., Gmail, Outlook, iCloud).
3. You have a digital certificate (also known as a private key) from a trusted certificate authority (CA) or your organization's IT department.

Step 1: Enable S/MIME in Apple Mail

1. Open the Apple Mail app on your iPhone.
2. Tap the "Mail" menu and select "Preferences" (or "Settings" on older iOS versions).
3. Scroll down and tap "Accounts".
4. Select the email account you want to use for digital signing.
5. Tap "Advanced" and toggle the switch next to "S/MIME" to the "On" position.

Step 2: Import your digital certificate

1. Tap "S/MIME" and then tap "Import Certificate".
2. Select "Import from File" and choose the digital certificate file (usually a .p12 or .pfx file) from your device's storage.
3. Enter the password for your digital certificate (if prompted).
4. Tap "Import" to import the certificate.

Step 3: Configure your email account for digital signing

1. Go back to the "Accounts" screen and select your email account.
2. Tap "Advanced" and toggle the switch next to "Sign with S/MIME" to the "On" position.

Step 4: Compose and digitally sign an email

1. Compose a new email in Apple Mail.
2. Tap the "Signature" field and select "S/MIME" from the dropdown menu.
3. Choose the digital certificate you imported earlier.
4. Tap "Send" to send the digitally signed email.

Verification:

When the recipient receives your digitally signed email, they can verify the signature using their own digital certificate or a trusted CA. This ensures that the email has not been tampered with or altered during transmission.

That's it! You should now be able to digitally sign emails using your iPhone and Apple Mail.