What should you do when active customer emails are suppressed in transactional email tools like SES?
Published 27 Jul 2025
Updated 6 Oct 2026
13 min read
Summarize with
Updated on 6 Oct 2026: We updated the recovery steps for SES delivery events, suppression scope, and safe customer restoration.
Manually removing active customers from an SES suppression list can be the right fix, but only after you know why each address was suppressed and the customer has a clear reason to receive mail again. It is not enough as a blanket solution. If your application suppressed an address after a temporary failure, restore it only after the failure has cleared and the customer still wants the mail. A support request starts the review; it does not prove that the mailbox works. If the reason was a spam complaint, require an explicit request for the affected mail. For a permanent bounce, resolve the recorded cause or verify a corrected address before approving another send.
The key distinction is that SES suppression is provider-side. SES stopped sending to that address to protect your sending reputation. Removing the address from SES does not reset Google, Yahoo, or any other mailbox provider's own filtering decisions. It allows SES to attempt delivery again if other sending controls permit it; your application's suppression flags and SES validation settings still apply. If the underlying reason is still present, the message can bounce again, trigger another complaint, or be filtered at the mailbox provider.
Treat this as an incident workflow, not a data cleanup task. Export the suppression data, split it by complaint, hard bounce, application-recorded soft bounce, and unknown reason, fix authentication and message quality issues, then restore only the addresses that meet a written policy.
When to remove a suppressed address
Do not bulk-delete active customers from the suppression list just because they still have accounts. Active customer status tells you the person has a relationship with the business. It does not prove that the mailbox is valid, that the address owner wants those emails, or that a complaint was accidental.
Immediate rule
Treat complaint-based suppressions as user intent until the customer explicitly requests the affected mail. For permanent bounces, inspect the event subtype and diagnostic before deciding whether the address is invalid or another rejection cause needs fixing.
- Restore: Remove only an approved suppression after the customer requests the affected mail and the recorded failure has been resolved, or a replacement address has been verified.
- Hold: Keep it suppressed when the reason is a complaint, repeated hard bounce, or an unknown event with no customer confirmation.
- Throttle: Restore in small batches so you do not create a sudden burst of bounces or complaints.
Manually removing someone does not automatically hurt reputation. The damage comes from sending again to people who complain, addresses that no longer exist, or mailboxes that already rejected your mail for a reason you have not fixed.
Why the suppression happened
Suppression lists exist because repeated failed sends are a reputation problem. Amazon SES account-level suppression can automatically record hard bounces and complaints; it does not automatically add addresses for soft bounces. An application or another transactional provider can also suppress after repeated temporary failures or its own policy decision. Suppression can be local to an account, isolated to a tenant, or controlled by a configuration set depending on the sending setup.
The most important mistake is treating all suppressions as the same type of failure. A mailbox full error is not the same as a spam complaint. A typo in an email address is not the same as a user who reported appointment reminders as unwanted.
|
|
|
|
|---|---|---|---|
Complaint | User objected | Confirm intent | Only after opt-in |
Hard bounce | Permanent event; inspect the subtype and diagnostic | Resolve the rejection cause or correct the address | After the cause is resolved |
Soft bounce | Temporary failure | Let SES retries finish; resolve the temporary issue | If locally suppressed |
Unknown | Missing event | Investigate | Not yet |
Use this table to decide the first action for each suppressed address.
For hard bounces, also check whether the address has since been corrected in the product. If a customer says they are missing password resets or receipts, use a hard-bounce recovery workflow: investigate the diagnostic, resolve the cause or verify a corrected address, remove only the approved suppression, send one required message, and watch the next event.
How to classify each address
Before anyone removes suppressions, build a small export with enough context to make a decision. Include the event reason, the last attempted send, the last successful delivery, the message type, the domain or subdomain used, and whether the customer has contacted support. Also record the suppression source, AWS Region, tenant, configuration set, SES message ID and feedback ID so the review can be traced to the original event.
Suppression review fieldstext
email_address,customer_id,suppression_source,reason,last_delivery,last_attempt aws_region,tenant_name,configuration_set,ses_message_id,feedback_id message_type,sending_domain,complaint_event,bounce_type,bounce_subtype,bounce_code event_timestamp,support_ticket,customer_confirmed,next_action,owner
That export turns the problem into a review queue. It also stops the conversation from being abstract. If most active customers were locally suppressed after temporary failures during a known mailbox outage, the fix is different from a list with a high share of complaints about reminder emails.
Eligible for restoration review
- Confirmed: The customer requested the affected required mail and the recorded failure has been resolved.
- Corrected: A replacement address was verified; keep the old invalid address suppressed.
- Transient: A temporary failure behind local suppression has cleared and pending SES retries have finished.
Do not restore yet
- Complaint: The customer reported the message as spam or unwanted.
- Repeated: The same mailbox has hard-bounced more than once.
- Unknown: No one can explain why the address was suppressed.
Check sending domain authentication
If customers are missing required transactional mail, check the sending domain before restoring a large group. Suppression is only one possible problem. Failed authentication, a missing DKIM domain match, a broken custom MAIL FROM setup, a newly listed IP, or a noisy transactional stream can cause the same customer-facing symptom: important mail does not arrive.
A domain health check should verify SPF, DKIM, DMARC, MX, and related DNS. For SES, DMARC passes when either DKIM or SPF passes and its authenticated domain matches the visible From domain under your DMARC settings. SPF domain matching generally needs a custom MAIL FROM domain. Then DMARC monitoring should show whether the transactional source is authenticating and passing DMARC domain matching at mailbox providers.
Issue steps to fix dialog showing the issue overview, tailored fix steps, and verification action
Suped's DMARC reporting product groups sending sources and reports SPF, DKIM, and DMARC results. During recovery, review the SES source for authentication failures and use SES delivery events for customer-specific delivery decisions. Aggregate DMARC reports arrive after receiver reporting intervals, so they are not an immediate delivery confirmation.
Example DMARC record for monitoring modetext
v=DMARC1; p=none; rua=mailto:dmarc-reports@example.com
This monitoring-mode record is an example for a new setup. Keep an existing p=quarantine or p=reject policy and add reporting without weakening enforcement.
After DNS checks, send a real message through the production path and inspect the headers with an email tester. This catches differences between a clean DNS record and the mail your application actually sends.
Email tester
Send a real email to this address. Suped shows a results button when the test is ready.
?/43tests passed
Reconfirm active customers
For an active logged-in customer, the safest recovery path is often inside the product. Show a banner when the user authenticates: email delivery is currently blocked for receipts, password resets, appointment reminders, or other required notices. Give two actions: confirm this email address, or replace it.
That approach records the customer's request without silently re-enabling mail to a mailbox where the recipient has already complained or where the address belongs to the wrong person. An in-app confirmation does not prove mailbox ownership or successful delivery. Verify a replacement address through your normal email verification process, keep the old invalid address suppressed, and keep marketing opt-outs separate from required-mail recovery.
Amazon SES recovery steps: identify suppression, confirm the customer, remove the approved entry, and monitor delivery.
For regulated or other sensitive accounts, add a non-email route for verification when the email address has failed. Available routes include in-person confirmation, phone support, secure portal messaging, or postal notice depending on the risk and account type. Do not send sensitive mail to the wrong address just because the account is active.
Keep transactional mail clean
Complaint-based suppressions are often a message design problem. If users complain about transactional mail, inspect the content before blaming the list. Check for excessive frequency, promotional content, an unfamiliar sender, or missing preference controls.
- Purpose: Send only account, security, billing, appointment, receipt, or service-critical mail on the transactional domain.
- Frequency: Reduce repeated reminders that make users reach for the spam button.
- Recognition: Use a clear sender name, expected subject line, and plain explanation of why the user received it.
- Correction: Add a "sent to the wrong address" path for account-related messages.
If marketing language has slipped into a transactional stream, separate it. Transactional mail needs the lowest possible complaint risk because customers rely on it for access, payments, bookings, and security events.
Check SES suppression scope and overrides
Before deciding that SES ignored a suppression, identify which list and settings applied to the send. The account-level suppression list belongs to one AWS account in the current AWS Region. A configuration set override or tenant-level scope can change which reasons are suppressed and which list SES checks.
- Account level: Check the same AWS Region used for the send and confirm that the entry's BOUNCE or COMPLAINT reason is enabled in the account settings.
- Configuration set: Review the settings used by the actual send: a configuration set can override suppression reasons, scope, or both, and can disable list suppression for that stream.
- Tenant level: ACCOUNT is the default tenant scope. With TENANT scope, SES checks the tenant's list instead of the account list; configuration set overrides take precedence.
- Global list: SES manages this list in the background. It cannot be queried or edited, and a suppressed global-list send appears as a permanent bounce with the Suppressed subtype. Account-level suppression settings can override the global list, so a global entry does not always prevent an attempted delivery.
SES accepts an attempted send covered by the applicable list settings but does not deliver it, and the attempt still consumes daily sending quota. Account- and tenant-list suppressed attempts are excluded from SES Reputation.BounceRate and Reputation.ComplaintRate; raw Bounce or Complaint metrics still include suppression events. A global-list Suppressed bounce counts toward the account bounce rate. Account-list entries normally remain until removed, so waiting for a temporary failure to clear does not itself restore sending. Suppression management calls require the exact stored address case, even though normal sending treats case variants as the same destination.
If no relevant list entry exists, inspect the event for EmailValidationSuppressed and check the Auto Validation threshold applied by the account or configuration set. Deleting a suppression-list entry does not change that validation threshold.
Complaint data has a gap
Gmail does not provide spam complaint data to SES, so Gmail recipients who press the spam button are not automatically added to the SES account-level suppression list for complaints. Use recipient preferences, engagement signals, and support reports as additional controls.
Verify SES events and application suppression
Start with application logs, as recommended in AWS's delivery troubleshooting guidance. Confirm a SendEmail or SendRawEmail request and retain its message ID. A successful API response or Send event proves acceptance by SES, not delivery. A Delivery event means the recipient's server accepted the message, not that it reached the inbox.
- Record the SES messageId with the customer ID, recipient, AWS Region, configuration set and tenant; follow that recipient's Delivery, Bounce, Complaint and DeliveryDelay events.
- Enable Amazon SNS feedback notifications or a configuration set event destination, and verify that production sends use the intended settings.
- Inspect bounceType and bounceSubType, plus the diagnosticCode where available. OnAccountSuppressionList and OnTenantSuppressionList mean SES blocked the send locally; they do not prove the mailbox is invalid.
- Synchronize an approved restore with local do-not-send flags and retry queues while preserving marketing opt-outs. Use event IDs and timestamps so duplicate or older callbacks do not silently undo a reviewed restore.
Avoid automatically resending while SES is still retrying a temporary deferral such as greylisting. After recovery, generate a fresh password reset or current notice instead of replaying expired links or every queued notification. When escalating to AWS Support, include the recipient, message ID and request ID.
Recover through SES
In SES and similar transactional systems, the operational process is straightforward once the policy is clear. Find the suppressed destination, record the reason and timestamp, remove only approved addresses, send one necessary message or a controlled test, then watch the next event. Keep a ticket trail for every complaint-based restore.
Review and remove one SES suppressionbash
aws sesv2 get-suppressed-destination \ --email-address User@example.com \ --region us-east-1 aws sesv2 delete-suppressed-destination \ --email-address User@example.com \ --region us-east-1
Replace the example address and Region with the exact stored address case and the Region used for sending. If tenant-level suppression applies, add --tenant-name YOUR_TENANT to both commands using a current AWS CLI version. Omitting that parameter targets the account-level list.
Amazon SES account-level suppression list showing email addresses, suppression reasons, and restoration actions.
Avoid restoring a large historical backlog in one job. A sudden spike of mail to addresses that have not received anything for weeks can create new bounces and complaints. A staged restore lets you stop quickly if the first group fails.
Illustrative restoration progress
An illustrative cumulative schedule, not an AWS recommendation. Expand only after reviewed sends show acceptable delivery and complaint results; pause when failures recur.
Cumulative share of approved addresses restored
Monitor after restoring
Monitor each restored send immediately and continue reviewing over the following days. Separate actual recipient-server failures and complaints from SES suppression events when calculating recovery rates. Watch delivery events, deferrals, mailbox provider placement, DMARC domain-matching results, and any blocklist (blacklist) movement. If complaints reappear, stop the batch and move those users back to a confirmation workflow.
This is also where blocklist monitoring belongs. A suppression incident is usually address-level, but a bad restore can become domain or IP reputation damage if it creates enough negative events.
Post-restore checks
- Events: Confirm whether the restored send delivered, bounced, deferred, or generated a complaint.
- Authentication: Confirm that SPF or DKIM passes with DMARC domain matching for the actual transactional source.
- Reputation: Check domain and IP signals before expanding the next restore batch.
- Product: Confirm current delivery status before clearing the in-app banner; help the customer check spam or quarantine if the message remains missing.
For larger teams or MSPs, Suped's multi-tenant dashboard can organize authentication monitoring across domains and clients. Use those DMARC results alongside SES bounce and complaint events before expanding a restoration batch.
Views from the trenches
Best practices
Separate SES hard bounces and complaints; review application-recorded soft bounces on their own.
Ask active users to confirm the address before restoring complaint-based suppressions.
Use an authenticated account banner to request confirmation when required email is blocked.
Common pitfalls
Bulk deleting suppressions can restart mail to invalid or unwanted addresses all at once.
Treating active account status as consent ignores complaint and wrong-address risks.
Mixing promotional content into required transactional messages gives users a reason to complain.
Expert tips
Keep suppressions in place until the address owner requests email or updates the address.
Keep required messages on the transactional stream and preserve separate marketing opt-outs.
Use a non-email verification route for sensitive accounts when the customer cannot receive mail.
Marketer from Email Geeks says suppression reasons should be split into bounces and complaints because each group needs a different policy.
2024-04-30 - Email Geeks
Marketer from Email Geeks says SES suppression is separate from mailbox provider filtering and only controls whether SES attempts the send.
2024-04-30 - Email Geeks
