How Can I Find My Email Headers?

Email headers are the technical metadata attached to every message—routing hops, sender identity, and SPF / DKIM / DMARC results. When a campaign from systeme.io lands in spam, bounces, or looks wrong, support and deliverability guides (help article 3731) often ask you to copy the full headers from a received test email.

Headers are not visible in the normal reading view—you must use Show original, View message source, or similar in your mail client.

• Authentication-Results: pass/fail for SPF, DKIM, DMARC at Gmail, Outlook, Yahoo.
• Received: each server that handled the message (newest usually on top).
• From / Reply-To: displayed sender vs actual sending path.
• Return-Path: bounce address (envelope sender).
• List-Unsubscribe: required for bulk mail—see deliverability tips.
• X-Google-* / X-MS-*: provider-specific spam scores or categories (e.g. Promotions tab).

After you authenticate your domain on systeme.io, headers should show dkim=pass and spf=pass for your custom domain.

1. Open the email (ideally a test send from your systeme.io campaign).
2. Click the three vertical dots (More) top-right of the message.
3. Click Show original.
4. A new tab opens with summary + full raw message.
5. Click Copy to clipboard and paste into a text file or support ticket.

Tip: Send a test email to your Gmail inbox first, then capture headers from that copy.

1. Open the message.
2. Click the ⋯ menu (or More actions).
3. Choose View message source or View message details (wording varies by UI version).
4. Select all header text → copy.

Outlook desktop (Windows): Open message in its own window → File → Properties → copy text in Internet headers (shorter than full source but often enough).

Microsoft tightened requirements in 2025—headers help confirm alignment with warm-up best practices.

1. Open the email.
2. Click More (⋯).
3. Select View raw message or View full header (label may vary).
4. Copy the header block.

1. Select the message in Mail.
2. Menu View → Message → Raw Source (enable Show all headers in View menu if needed).
3. Copy from the top of the window through the blank line before the HTML/plain body.

iPhone / iPad: Apple Mail does not reliably expose full headers. Use Gmail web on a computer, or forward the message to Gmail and use Show original there.

1. Open the message.
2. View → Headers → All (or right-click → View Source).
3. Copy the full source including headers.

• Full headers (not a screenshot of the subject line only).
• Approximate send time (timezone).
• Sender address configured in systeme.io Settings → Emails.
• Whether the domain shows Verified in systeme.io.
• Recipient address provider (Gmail, Outlook, etc.).

Remove unrelated personal emails from the paste if sharing publicly; headers can contain addresses and IDs.

If authentication fails, re-check Hostinger, IONOS, or your host’s DNS guide—not the email body.

What are email headers?

Technical metadata: routing and authentication, not the visible email body.

Gmail?

⋮ → Show original → Copy to clipboard.

Why systeme.io asks for them?

To investigate deliverability and spam folder placement (article 3731).

Important lines?

Authentication-Results, SPF, DKIM, From, Return-Path.

iPhone?

Use Gmail web Show original or desktop Mail raw source.

• How to Improve Your Email Deliverability
• How to Authenticate Your Domain Name for Email Sending
• Why Do My Emails Arrive in the Gmail Promotions Tab?
• How to Confirm Your Email Sender Address

Copy headers once, fix DNS and sender setup on systeme.io, then re-test until spf=pass and dkim=pass appear.