What’s the difference?
Transactional emails are triggered by a user’s action and contain information they expect to receive. They’re one-to-one and time-sensitive. Marketing emails are sent to a group of recipients to promote something. They’re one-to-many and not triggered by a specific user action. The distinction matters for deliverability, compliance, and how you should handle each type.Transactional emails
Transactional emails are sent in response to something the user did. The recipient expects them — they’re part of the product experience. Examples:- Password reset emails
- Email verification / confirmation
- Order confirmations and receipts
- Shipping notifications
- Account activity alerts (login from new device, payment failed)
- Two-factor authentication codes
- Invoice and billing emails
- Invitation emails (team invites, shared documents)
- Triggered by user action
- Sent to one recipient at a time
- Time-sensitive (a password reset link that arrives 2 hours late is useless)
- Expected by the recipient
- Don’t require an unsubscribe link (but compliance varies by jurisdiction)
- Typically have very high open rates (60–80%)
Marketing emails
Marketing emails are sent proactively by the business to a list of recipients. The goal is to inform, engage, or sell. Examples:- Newsletters
- Product announcements
- Promotional offers and discounts
- Event invitations
- Re-engagement campaigns (“We miss you!”)
- Educational content / drip campaigns
- Sent to a group of recipients
- Not triggered by a specific user action
- Require explicit opt-in consent
- Must include an unsubscribe link (legally required)
- Typically have lower open rates (15–30%)
- Subject to stricter spam filtering
Why you should separate them
Sending transactional and marketing emails from the same domain and infrastructure creates a risk: if your marketing emails generate complaints or bounces (which is more likely), the reputation damage spills over to your transactional emails. A password reset email going to spam because your last newsletter had a high complaint rate is a bad user experience.Use separate subdomains
The most common approach is to use different subdomains:| Type | Subdomain | Example |
|---|---|---|
| Transactional | send.acme.com | Password resets, receipts |
| Marketing | mail.acme.com | Newsletters, promotions |
Use separate senders
Within SendKit, create different senders for each type:| Sender | Use |
|---|---|
noreply@send.acme.com | Transactional (password resets, alerts) |
hello@send.acme.com | Transactional (welcome emails, receipts) |
news@mail.acme.com | Marketing (newsletters) |
offers@mail.acme.com | Marketing (promotions) |
Deliverability differences
Email providers treat these types differently:| Factor | Transactional | Marketing |
|---|---|---|
| Spam filtering | More lenient — providers know users expect these | Stricter — higher scrutiny |
| Gmail tabs | Usually lands in Primary | Often lands in Promotions |
| Engagement expectations | High opens expected | Lower opens tolerated |
| Complaint tolerance | Very low — any complaints are a red flag | Slightly higher tolerance |
| Delivery priority | Higher — time-sensitive | Lower — not urgent |
Compliance differences
Unsubscribe requirements
- Transactional: Generally exempt from unsubscribe requirements in CAN-SPAM and GDPR, because they’re necessary for the service the user signed up for
- Marketing: Must include a working unsubscribe link. This is legally required in CAN-SPAM, GDPR, LGPD, and most other jurisdictions
Consent requirements
- Transactional: Implied consent — the user signed up for your service and expects operational emails
- Marketing: Explicit consent required — the user must actively opt in to receive marketing emails
The gray area
Some emails don’t fit neatly into either category:| Type? | Reasoning | |
|---|---|---|
| Welcome email after signup | Transactional | Triggered by user action, expected |
| Onboarding series (tips, tutorials) | Gray area | Related to user action but promotional in nature |
| Usage report / weekly summary | Transactional | User-specific, informational |
| ”Your trial is expiring” | Transactional | Account-related, time-sensitive |
| ”Check out our new feature” | Marketing | Not triggered by user action, promotional |
| Review/feedback request | Gray area | Related to a purchase but not transactional in nature |
FAQ
Can I send both types through SendKit?
Can I send both types through SendKit?
Yes. SendKit handles both transactional and marketing emails. We recommend using separate subdomains and senders for each type to protect your transactional deliverability.
Do transactional emails need an unsubscribe link?
Do transactional emails need an unsubscribe link?
Under CAN-SPAM (US), transactional emails are exempt from the unsubscribe requirement. Under GDPR (EU) and LGPD (Brazil), the rules are more nuanced — operational emails necessary for the service are generally exempt, but you should consult legal advice for your specific case.
What if my transactional emails have low open rates?
What if my transactional emails have low open rates?
Transactional emails should have open rates of 60%+ (often higher). If yours are low, check: (1) Are they landing in spam? Check authentication. (2) Are they actually transactional? If they’re disguised marketing, recipients may ignore them. (3) Are your subject lines clear and descriptive?