# Deliverability

> What decides whether your email reaches the inbox, what Emailit handles for you automatically, and where to start improving your inbox placement.

Deliverability is the share of your email that lands in the inbox rather than the spam folder or nowhere at all. This section explains what mailbox providers look at, what Emailit does for you on every message, and what's left for you to manage.

## What mailbox providers look at

Gmail, Outlook, Yahoo and other providers decide where a message goes based on four things:

| Area | What it means | Where to learn more |
| --- | --- | --- |
| **Authentication** | SPF, DKIM and DMARC prove the message really comes from your domain. | [Sending domains](/docs/domains/), [DMARC reports](/docs/dmarc/) |
| **Reputation** | Your domain's and sending IP's history: bounce rates, complaints and how recipients engage. | [Sending health](/docs/deliverability/sending-health/), [Warm up](/docs/deliverability/warm-up/) |
| **List hygiene** | Sending only to valid addresses of people who asked for your mail. | [Suppressions](/docs/suppressions/), [Email verification](/docs/email-verification/) |
| **Content** | Subject, HTML, links and attachments that look like legitimate mail, not spam. | [Spam checks](/docs/deliverability/spam-checks/) |

Authentication is a yes-or-no gate. Reputation and list hygiene build up over weeks, and you control them through who you send to and how often.

## What Emailit does automatically

On every message, without any setup beyond verifying your domain:

- **Signs with DKIM.** Each message gets a DKIM signature with your domain's 2048-bit key, so it aligns with your `From` domain for DMARC.
- **Sets the return path.** Bounces go to `emailit.<domain>`, which is covered by SPF and aligns with your domain under DMARC's relaxed alignment.
- **Scores content before sending.** Emailit checks each signed message with Rspamd. Messages that score 7 or higher are held instead of sent. See [Spam checks](/docs/deliverability/spam-checks/).
- **Retries temporary failures.** Messages that get a temporary error are retried up to 7 times over about 21 hours.
- **Backs off when receivers push back.** When a provider rate-limits or blocks a sending IP, Emailit pauses delivery to that provider from that IP for a while instead of hammering it.
- **Classifies bounces and complaints.** Permanent failures, late bounce reports and spam complaints from feedback loops are matched to the original message and update its status. See [Bounces and complaints](/docs/deliverability/bounces-and-complaints/).
- **Suppresses bad addresses.** Addresses that bounce or complain are added to your suppression list, so you don't keep mailing them. See [Suppressions](/docs/suppressions/).
- **Monitors sending health.** Emailit tracks the bounce rate of your workspace and each domain, and pauses a domain before it does lasting damage. See [Sending health](/docs/deliverability/sending-health/).
- **Re-checks DNS daily.** If a domain's records break, Emailit stops sending from it and emails the workspace owner.
- **Adds unsubscribe headers to campaigns.** Campaign emails include `List-Unsubscribe` and one-click unsubscribe headers.

## What you manage

- Publish a DMARC record and move it toward enforcement over time.
- Send only to people who opted in, and remove inactive addresses.
- Verify lists you didn't collect yourself before you mail them.
- Keep your bounce rate under 2% and your spam complaint rate under 0.1%.
- Ramp up volume gradually on new domains and IPs.

[Email best practices](/docs/deliverability/best-practices/) turns this into a checklist.

## In this section

  - [Best practices](/docs/deliverability/best-practices/): Authentication, consent, list hygiene, content and bulk sender rules.
  - [Sending health](/docs/deliverability/sending-health/): Your 0–100 score, bounce thresholds and automatic limit raises.
  - [Spam checks](/docs/deliverability/spam-checks/): How Emailit scores content and what to do with held email.
  - [Bounces and complaints](/docs/deliverability/bounces-and-complaints/): Hard and soft bounces, retries, feedback loops and suppression rules.
  - [Warm up a domain or IP](/docs/deliverability/warm-up/): A ramp schedule for new senders.
  - [Dedicated IPs](/docs/deliverability/dedicated-ips/): When to move off shared IPs and how to request one.

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Source: https://emailit.com/docs/deliverability/