Delivery vs Deliverability
Delivery means the receiving server accepted your email rather than bouncing it. Deliverability means it landed where people will see it: the inbox, rather than spam.
An email can be delivered and still end up in spam. That's why delivery rates in your reports can look high while engagement stays low.
We'd focus on four things: authenticate your domain, send only to people who opted in, keep your list clean and send emails people want to open. Most deliverability problems trace back to one of these.
The Five Factors
| Factor | What inboxes look at | What you can do |
|---|---|---|
| Authentication | Whether SPF, DKIM and DMARC pass | Set up custom DKIM and DMARC |
| Sender reputation | Your history of complaints, bounces and engagement | Send consistently to engaged, opted-in subscribers |
| List quality | Invalid addresses, spam traps, inactive subscribers | Use confirmed opt-in where helpful and clean regularly |
| Engagement | Opens, replies, moves out of spam, deletes without reading | Send relevant emails at a sensible frequency |
| Content and format | Broken code, misleading subject lines, suspicious links | Keep emails honest, well built and consistent |
Authentication
Authentication proves your emails come from you. It's now a requirement for high-volume senders at Gmail, Yahoo and Outlook, and good practice for everyone.
See SPF, DKIM and DMARC setup and Gmail and Yahoo sender requirements.
Sender Reputation
Mailbox providers build a reputation for your sending domain and the servers you send from. Good reputation comes from low complaints, few bounces and readers who engage.
Reputation builds slowly and can drop quickly. A single send to an old or purchased list can undo months of good behavior. See buying email lists.
List Quality
- Collect addresses with permission through your own forms.
- Consider confirmed opt-in if your forms attract fake or mistyped addresses. See double vs single opt-in.
- Remove hard bounces immediately. Most email platforms do this automatically.
- Re-engage or remove inactive subscribers every few months. See email list hygiene.
Engagement
Inboxes notice whether people open, read, reply to and rescue your emails from spam, or delete them unread and report them. Relevant, expected emails build positive signals.
Practical ways to improve engagement: segment your list, send at a consistent frequency, write clear subject lines and invite replies. See email segmentation.
Content and Format
Content plays a smaller role than many people think, but it still matters:
- Avoid misleading subject lines and fake "Re:" prefixes.
- Balance images and text; avoid emails that are a single image.
- Use reputable links and avoid link shorteners that hide destinations.
- Include a clear unsubscribe link and your physical address.
- Keep your From name and address consistent.
See spam trigger words for why individual words matter less than overall patterns.
Deliverability Checklist
- Send from your own domain with custom DKIM and a DMARC record.
- Only email people who opted in.
- Warm up gradually if you're new or returning after a long break, starting with your most engaged subscribers.
- Monitor bounces and complaints after every send.
- Clean your list every few months.
- Make unsubscribing easy.
- Check Google Postmaster Tools if you send to many Gmail addresses.
Deliverability in AWeber
AWeber requires a custom-domain sending address, guides you through custom DKIM and DMARC, and handles unsubscribe processing and bounces. Its import review also helps keep purchased or unknown lists off the platform. See AWeber deliverability.
Set up authentication, manage bounces and unsubscribes and send to a clean list with AWeber, starting on the free plan.
Email Deliverability FAQs
What is email deliverability?
Whether your emails reach the inbox rather than spam or being blocked.
What affects email deliverability most?
Authentication, sender reputation, list quality and engagement.
How can I improve deliverability quickly?
Authenticate your domain, stop emailing inactive or unverified addresses and send relevant emails consistently.
Does my email platform affect deliverability?
It plays a part, but your own list and sending practices usually matter more.