Overview
Email Studio is the primary workspace for email marketing in SFMC. It handles the entire send workflow — selecting your email, defining your audience, configuring send settings, and scheduling. Alongside Content Builder (where you design emails), Email Studio is where most day-to-day marketing operations happen.
Email Studio vs Content Builder
| Task | Where it lives |
|---|---|
| Building/designing an email | Content Builder |
| Managing images and assets | Content Builder |
| Sending an email to an audience | Email Studio (Send flow) |
| Tracking and reporting on a send | Email Studio (Tracking tab) |
| Managing subscriber lists | Email Studio (Subscribers tab) |
| Configuring triggered sends | Email Studio (Interactions tab) |
The send flow
The Email Studio send flow is a five-step wizard accessed via Interactions → Emails → Send.
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1Select emailChoose the email from Content Builder. The email must be in Active or Final status. Draft emails cannot be sent. You'll see a preview thumbnail to confirm you've selected the right one.
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2Select recipientsChoose a Data Extension, List, or Group as your send audience. You can also add suppression lists — DEs or Lists whose members will be excluded even if they appear in your send audience. Common suppressions: unsubscribers, recent purchasers, competitors, seed/test addresses.
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3Select send classificationThis sets From Name, From Address, Reply-To, and the CAN-SPAM category. Pre-configured by your admin. Select the appropriate one — wrong classification on a transactional email can result in sending to opted-out subscribers unintentionally, or vice versa.
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4Review and validateSFMC checks for common issues: missing unsubscribe link, broken images, missing From address, empty subject line. Always send a test to a real inbox at this stage. Use Profile Preview to render the email as specific subscribers to catch personalisation issues.
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5Schedule or sendChoose Send Now for immediate delivery, or schedule for a specific date and time (SFMC's timezone). For timezone-aware scheduling (send at 10am in each subscriber's local timezone), use Journey Builder instead.
Before every send: (1) preview as 3+ different subscriber profiles, (2) send a test to mobile and desktop clients, (3) verify all links, (4) check subject line for personalisation errors, (5) confirm the correct audience DE is selected, (6) confirm the correct suppression DEs are applied.
Send classifications
A Send Classification bundles the sender identity and CAN-SPAM category. Every email send requires one. Your admin sets these up in Setup.
| Component | What it sets |
|---|---|
| Sender profile | From Name, From Email Address, Reply-To address |
| Delivery profile | IP pool (which IPs to send from), custom header/footer domain |
| CAN-SPAM classification | Commercial or Transactional |
Commercial vs Transactional
| Commercial | Transactional | |
|---|---|---|
| Purpose | Marketing, promotions, newsletters | Receipts, shipping, password resets, account alerts |
| Respects opt-out? | Yes — cannot send to unsubscribed | No — can send to opted-out subscribers |
| Unsubscribe required? | Yes | Not mandatory (but still good practice) |
| Physical address required? | Yes (CAN-SPAM) | Yes (CAN-SPAM) |
Using a Transactional classification for marketing emails is a serious compliance violation. Only use Transactional for emails that are genuinely required service communications. Sending a promotion as "transactional" to bypass opt-outs can result in CAN-SPAM/GDPR penalties and immediate IP reputation damage.
Audience & suppression
The quality of your audience determines the health of your programme. Always start with a clean, well-segmented send list.
Suppression best practice
Suppression lists are audiences to exclude. Apply these to every commercial send:
- Global unsubscribes — anyone who has ever opted out (SFMC handles this automatically via the All Subscribers list, but you should also maintain a suppression DE)
- Hard bounces — any email that resulted in a permanent delivery failure
- Spam complaints — subscribers who marked a previous send as spam
- Competitors — known competitor email domains
- Internal addresses — test and seed addresses used for monitoring
- Recent purchasers — suppress from promotional sends if they just bought (context-dependent)
Preview & testing
Thorough testing prevents errors reaching your audience. Use these tools in Email Studio:
| Tool | What it does |
|---|---|
| Profile Preview | Renders the email as a specific subscriber from your DE — essential for testing AMPscript personalisation |
| Test Send | Sends a test copy to one or more email addresses. The email renders with the test subscriber's data. Always test on mobile and Outlook. |
| Inbox Preview (add-on) | Renders the email across 90+ email clients and devices. Requires Litmus or Email on Acid integration. |
| Spam Check | Runs the email through spam filter rules to flag potential deliverability issues |
| Validation | Checks for structural problems — missing unsubscribe link, empty subject, missing From address |
A/B testing
Email Studio has a built-in A/B test wizard for splitting your audience and testing variants.
What you can test
- Subject line (most common)
- From name
- Full email content (requires two separate emails)
- Send time
- Preheader text (test as part of subject line variant)
Setting up a subject line test
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1Enter the send flow and choose A/B TestIn the email selection step, choose A/B Test instead of a single email. You'll be prompted to set up test parameters.
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2Configure variantsFor a subject line test, add two subject lines. Set the percentage split for the test portion (e.g. 10% A, 10% B). The remaining 80% receives the winning variant.
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3Choose the winning metric and wait timeSelect Open Rate or Click Rate as the winner metric. Set a wait time (typically 2–8 hours). After the wait, SFMC automatically sends the winner to the remaining audience.
Open rate as a winner metric is less reliable post-Apple MPP (2021), which inflates open rates for Apple Mail users. Where possible, use Click Rate as your winner metric — it's a more direct signal of engagement.
Deliverability
Deliverability is how reliably your emails land in the inbox vs spam. It's the result of your sender reputation, authentication setup, list hygiene, and content quality.
Authentication — what you need
| Record | What it does | Where configured |
|---|---|---|
| SPF | Lists which IPs are authorised to send email for your domain | Your DNS provider |
| DKIM | Adds a cryptographic signature to verify message integrity | SFMC SAP setup + DNS |
| DMARC | Tells receivers what to do with messages that fail SPF/DKIM | Your DNS provider |
Bounce types and handling
| Bounce type | Meaning | SFMC action |
|---|---|---|
| Hard bounce | Permanent delivery failure (invalid address, domain doesn't exist) | Marks subscriber as Bounced — no more emails |
| Soft bounce | Temporary failure (mailbox full, server down) | Retries; after several failures, moves to Held |
| Technical bounce | Infrastructure issue (DNS lookup failure, connection timeout) | Similar to soft bounce — retried |
Target a bounce rate under 2% and a spam complaint rate under 0.08%. Above these thresholds, Gmail and Outlook will start filtering your email to spam. Run a bounce cleanup query monthly and remove hard-bounced addresses from your master DE.
Tracking & reports
After each send, tracking data appears in Email Studio under Tracking. You can drill into individual sends for detailed metrics.
Key metrics explained
| Metric | Formula | What it tells you |
|---|---|---|
| Delivered rate | Delivered / Sent | Health of your send infrastructure and list |
| Unique open rate | Unique opens / Delivered | Interest in your subject line — but inflated post-MPP |
| Unique click rate | Unique clicks / Delivered | Content engagement — most reliable metric post-MPP |
| CTOR | Unique clicks / Unique opens | How relevant your content is to those who opened |
| Unsubscribe rate | Unsubscribes / Delivered | Content or frequency relevance — keep under 0.5% |
| Bounce rate | Bounces / Sent | List quality — keep under 2% |
Link tracking
SFMC automatically wraps all links in your email with tracking redirects so it can record every click. You can see which specific links were clicked and how many times in the Clicks by Link report within each send's tracking detail.