# How to read Gmail's Show original Source: https://www.tryletterhead.com/blog/gmail-show-original.html Sample data, laid out like the summary at the top of Gmail's Show original. Show original is Gmail's view of a message's raw source. The table at the top answers the question most senders have: did this message pass SPF, DKIM and DMARC? To open it, open the message in Gmail on the web, click the three-dot menu next to Reply and choose **Show original**. Want a second opinion on what it says? Paste the whole page into the free [DKIM checker](../tools/dkim-checker.html), which reads the selector from the signature and checks your domain's records. ## How do you open Show original in Gmail - Open the message in Gmail on a computer. The phone apps don't offer Show original. - Click the three-dot menu next to the Reply button. - Choose **Show original**. It opens in a new tab. - To share it, use **Copy to clipboard** or **Download original** at the top. Use a copy of your newsletter that you received as a reader, not the one in your Sent folder. ## What does the summary table mean Line Example What it tells you Message ID The message's unique ID. Useful when you ask your platform to trace a send. Created at The date and time When the sending server created the message. From Your publication's name and address The From address DMARC checks against. SPF PASS with an IP address The sending server was listed in your SPF record. DKIM PASS with domain yourdomain.com The signature checked out. Make sure the domain is yours, not your platform's. DMARC PASS SPF or DKIM passed and lined up with your From domain. ## What should you look for below the table - **Authentication-Results** shows the receiving server's full verdict on each check. - **DKIM-Signature** holds s=, your selector, and d=, the signing domain. - **List-Unsubscribe** and **List-Unsubscribe-Post** are the headers behind Gmail's unsubscribe button. Bulk senders need both. - **Received** lines trace the path the message took, newest first. ## What should you do when SPF, DKIM or DMARC fails Result Likely cause What to do SPF fail or softfail The server that sent the message isn't in your SPF record Add your platform's include to your one SPF record DKIM fail The published key doesn't match, or the message changed on the way Re-copy the key from your platform. Check for list software adding footers. DKIM pass, wrong domain Your platform signs with its own domain Set up DKIM on your own domain in the platform's settings DMARC fail Neither SPF nor DKIM lined up with your From domain Fix alignment before you tighten your DMARC policy _Free tool · DKIM checker_ Find your DKIM selector and check your key. Type your sending domain, or paste an email you sent and we read the selector from its signature. No signup. [Check your DKIM](../tools/dkim-checker.html) For what each record does, see [what is DKIM](../blog/what-is-dkim.html). To see how an issue looks in Gmail and Outlook before it goes out, see [how to test a newsletter in Gmail and Outlook](../blog/test-newsletter-gmail-outlook.html). Letterhead checks every issue before you schedule it. [Book a test drive](../lp/test-drive.html) #deliverability #how-to #gmail _Keep reading_ ## More on this topic. [Why Gmail Clips Your Newsletter (and How to Stay Under 102KB) Gmail cuts off emails with more than about 102KB of HTML, hiding your last stories and your unsubscribe link. What makes newsletters heavy and how to slim them down. Read the post](../blog/gmail-clipping-newsletter.html)[Catch-all, role and throwaway addresses: which to keep on your list Catch-all domains, role inboxes like info@ and throwaway addresses all look valid. What each one is, the risk it carries, and what to do with it. Read the post](../blog/catch-all-role-disposable-email-addresses.html)[DMARC record examples, from p=none to reject Copy-ready DMARC records for every stage, from p=none to quarantine to reject, what each tag does, and how to check the record you have now. Read the post](../blog/dmarc-record-examples.html) ## Get the Letterhead newsletter. Original analysis on newsletters, weekly. From the team that runs the operating system. [Subscribe](../blog/) [See past issues](../blog/)