Overview
The deliverability suite gives you a single, centralized view of how each domain and mailbox at your organization is performing. As a sales or operations leader, you can quickly spot deliverability bottlenecks, diagnose sending issues, and ensure your team's emails are reaching inboxes.
The deliverability suite lets you check key metrics like open and reply rates across mailboxes, verify domain authentication across your org, and run email warmup or check mailboxes against blocklists to ensure strong deliverability. You can even run inbox placement tests to see exactly where emails land.
By surfacing domain health, mailbox performance, and engagement trends across your team, the deliverability suite helps you safeguard your company's outreach to drive more consistent pipeline results.
You need to be an admin on Apollo to use the deliverability suite. If you're not an admin, reach out to someone who is for help.
Check out the following sections to use the deliverability suite on Apollo.
Get Started
To use the deliverability suite:
- Launch Apollo and click Settings > Deliverability suite.
- Apollo shows at-a-glance insights into your performance across all mailboxes connected to Apollo.
- Visualizations and metrics on the overview share relevant deliverability reporting:
By default, all team mailboxes are selected. Use the mailbox dropdown ▾ to view performance metrics for a specific mailbox.
Emails sent successfully
Apollo shows the percentage of emails that were successfully sent out of the total emails attempted over the past thirty days. Apollo also shows the exact number of emails delivered, the number bounced, as well as the percentage change in sent successfully from the previous month.
Open rate
Apollo shows the overall open rate, as well as the total number of emails opened, and the total number of emails clicked over the previous thirty days. Apollo also shows the percent change from the previous month.
Apollo only shows email tracking data if you have enabled open tracking or click tracking on the selected mailboxes. You should only use open or click tracking if you have a custom tracking subdomain and understand email deliverability best practices. Even then, it's important to use email tracking as part of a targeted, time-specific campaign, then deactivate tracking once complete to protect your domain reputation.
Reply activity
Apollo shows the percentage of sent emails that received a reply in the past thirty days, as well as the total number of replies and the total number categorized as positive. Apollo automatically analyzes replies to determine email sentiment. Positive sentiments include emails categorized as "willing to meet." Apollo also shows the percent change from the previous month.
Email deliverability and activity
The email deliverability and activity widget shows a visualization of your deliverability and activity. Click Activity to view the activity visualization. By default, these visualizations reflect the past seven days of activity. However, you can filter both visualizations by the last thirty days or last three months as well.
Top performing sequences
Apollo shows a visualization of your top performing sequences over the past thirty days, including statistics for # emails sent, # emails delivered, % emails opened, % emails interested, and # emails interested.
To learn more about these and other email metrics, check out Use Analytics Reports.
Recommendations
Apollo shows email deliverability recommendations and steps you can take now to fix critical issues.
- Click View recommendation to take action.
- Hover over a recommendation to manage it:
- Click ⊗ to dismiss a recommendation.
- Click ✓⃝ to mark as complete.
- Click Bookmark to save for later.
- You can sort recommendations by active, saved, completed, and dismissed.
Next, use the deliverability suite to check the health of your team's individual domains and mailboxes.
Check Domains
To check the health of your domains:
- Launch Apollo and click Settings > Deliverability suite.
- Click Domains.
- Apollo shows an overview of your domain authentication and bounce performance.
- Each domain widget shares relevant deliverability information:
Authenticated sending domains
Apollo shows the percentage of your domains that are authenticated out of the total domains.
Apollo also shows how many of each of your domains have authenticated SPF, DKIM, and DMARC records.
Pro-tip: Learn about domain authentication, what SPF, DKIM, and DMARC means, and why authentication is important to effective outbound.
Average bounce rate performance
Apollo shows your average bounce rate out of the total emails sent.
Domains
Apollo lists all your connected domains, along with their status, type, bounce rate, linked mailboxes, and redirect URLs. If you generated the domain on Apollo, the next bill date is displayed.
- Click Show filters to filter by domain health or authentication statuses.
- Click a domain to view more deliverability statistics. If you generated the domain on Apollo, you can also review billing information, redirect URLs, and DNS records.
You have now used the deliverability suite to check the health of your team's domains.
Next, use the deliverability suite to check the health of your team mailboxes.
Check Mailboxes
Use the deliverability suite to check the health of all the mailboxes connected to Apollo across your team. You can verify mailbox setup, manage email warmup, and run inbox placement or blocklist tests.
To check the health of your mailboxes:
- Launch Apollo and click Settings > Deliverability suite.
- Click Mailboxes.
- Apollo shows an overview of your organization's mailboxes.
- Each mailbox widget shares deliverability information.
Mailboxes completed and ready for use
Apollo shows the number of mailboxes completed and ready for use out of the total mailboxes connected.
Apollo also shows the total partially set up, not started, and needing attention.
Learn how to link a mailbox on Apollo — and share these instructions with teammates who have only partially set up theirs.
Mailboxes warmed up
Apollo shows the total number of mailboxes successfully warmed with email warmup.
Apollo also shows the mailboxes it recommends that you run warmup on. Email warmup helps ensure deliverability by prepping your mailbox for outreach standards.
Scroll to select a particular mailbox to manage email warmup.
Mailboxes
- Apollo lists all connected mailboxes along with relevant details.
| Type | Indicates whether the mailbox is a linked mailbox or a mailbox purchased through Apollo. |
| Setup | Shows the mailbox setup status, including whether it is fully configured, partially set up, or requires attention. |
| Warmup | Displays whether email warmup is active, recommended, or completed for the mailbox. Click a mail to manage email warmup. |
| Daily limit | Shows the configured sending limit for the mailbox to help control daily email volume. |
| Deliverability | Indicates overall mailbox health based on factors like engagement, bounce rates, and configuration, shown as a deliverability score. |
| Blocklist | Shows whether the mailbox appears on any blocklists based on recent blocklist checks. |
| Inbox placement | Displays results from inbox placement tests, indicating whether emails land in inboxes, spam, or promotions. |
| Last sync | Shows the most recent date and time the mailbox synced with Apollo. |
| Forwarding email | Lists the forwarding address used to route replies or track email activity for the mailbox. This setting is only available for mailboxes purchased on Apollo. |
- Click Show filters to filter by mailbox type, domains, user, warmup status, or email sending limit.
- Scroll to Blocklist beside a mailbox to check blocklist status.
- Scroll to Inbox placement beside a mailbox to run a placement test.
- Click a mailbox to see additional details.
- Click Overview to view detailed deliverability information, including deliverability score, tracking subdomain, email sending limits, unsubscribe link, and email signature, or to enable or disable email warmup.
- Click Deliverability to view detailed deliverability statistics and reports, or to run blocklist checks.
- Click Inbox placement to run inbox placement tests.
- Click Forwarding email to set a forwarding email address. This setting is only available to mailboxes purchased on Apollo.
Run Mailbox Diagnostic Test
You can run diagnostic tests on mailboxes connected to Apollo to determine whether your mailbox domains are on blocklists and to see where emails are landing in inboxes.
To get started, choose a mailbox diagnostic test:
A blocklist, sometimes called a "blacklist," is a list of domains or IP addresses that are flagged as sources of spam or harmful email. Apollo performs real-time checks on over fifty supported blocklist databases to determine if your mailbox's sending domain or IP address is associated with a blocklist, which can cause your emails to be blocked or sent to spam.
- Launch Apollo and click Settings > Deliverability suite.
- Click Mailboxes.
- Click Run check beside a mailbox.
- Apollo runs the blocklist check:
- Pending: Most checks complete within a few minutes. This status updates automatically.
- Healthy: The mailbox isn't on a supported blocklist. Continue to use the mailbox for outreach, and follow email best practices.
- Caution: Most blocklist providers returned a healthy result, but one or more providers couldn't be checked due to a technical issue. Because the check is incomplete, Apollo can't fully confirm your mailbox status. Re-run the check later.
- Blocklisted: The mailbox domain is on a blocklist. Click Blocklisted, and Apollo shares the blocklisted provider. If your domain is blocklisted, consider pausing outreach from this mailbox, and switch to another mailbox on a separate domain while you contact the blocklist provider to request removal.
- Retry: The blocklist check failed. Re-run the check later.
Apollo doesn't create or control email blocklists. Instead, blocklist providers maintain their own unique rules and processes for blocklists. If your domain appears on a blocklist, contact the blocklist provider directly for help removing it.
Inbox placement tests help you understand where your emails are landing: in the primary inbox, spam, or promotions folder.
- Launch Apollo and click Settings > Deliverability suite.
- Click Mailboxes.
- Click Run test to run an inbox placement test.
- Check the email providers you want to use for the test. Apollo sends five non-promotional seed emails per provider you select using the mailbox. No contacts in Apollo are emailed as part of this test.
- Click Confirm & run test.
- Apollo tests the mailbox's inbox placement.
Each inbox placement test typically takes between thirty minutes and one hour, depending on the provider selected. Testing multiple providers at once increases the total test duration.
- Click the mailbox to review the test results.
- Pending: This status updates automatically.
- Healthy: Most or all test emails, typically 90% or more, landed in the inbox, and not spam or promotions.
- Caution: Your mailbox delivered to the inbox for some providers, but not all — for example, four out of five providers. This indicates moderate deliverability performance. Review and optimize your setup with email best practices before scaling outreach.
- Unhealthy: A significant portion of test emails landed in spam, promotions, or were undelivered. This indicates poor sender reputation or domain configuration issues. Review your domain authentication, reduce sending limits to manage volume, improve email content quality, and ensure you're targeting verified prospects before continuing outreach.
- Failed: The inbox placement test failed due to a sending or provider issue, such as authentication errors, mailbox connection problems, or temporary sending limits. Resolve these issues, and re-run the test later.
- Apollo shows your inbox placement score and health, as well as a breakdown of where each test email landed by folder and by provider.
Blocklist checks and inbox placement tests are conducted through third-party providers. Participation is optional and entirely at your discretion. Apollo doesn't control, manage, or take responsibility for any third-party services or their practices.
You have now used the deliverability suite to check the health of your team's mailboxes.
Next Steps
Want to go deeper on deliverability and outbound strategy? Here are some helpful next steps to keep your team's emails landing in the right place.
| Email Deliverability Best Practices | Explore proven tactics and follow best practices to protect sender reputation and keep your outreach in inboxes, not spam. |
|---|---|
| Set Up Domain Authentication | Strengthen trust with email providers when you configure SPF, DKIM, and DMARC so your messages pass authentication checks every time. |
| Use Email Warmup to Improve Email Deliverability | Get new inboxes ready for volume by running automated warmup that builds sending reputation before your reps start outreach. |
| Troubleshoot Bounced Emails | Quickly diagnose issues when you resolve soft and hard bounces to lower bounce rates and keep your campaigns healthy. |
| Join the Apollo Community | Connect with the Apollo community to meet peers in sales ops and swap deliverability strategies so your team benefits from real-world lessons and shared expertise. |