The Email Center suppression list: why an address stops receiving and how to remove it

E-mail·· 33 views· 3 min read

The short answer: addresses on the suppression list never receive your e-mails. They join on their own after a permanent bounce or when the recipient marks you as spam, and you can add others by hand. Before every send they are removed, are not charged and are listed in suppressed in the answer.

Why it exists

Carrying on sending to an address that does not exist, or to someone who has already called it spam, is the fastest way for receiving servers to stop trusting your domain. The list stops those sends for you and protects the reputation of everything you send. More on reputation in a new domain sending e-mail.

How an address gets on it

Reason (reason) When
bounce A permanent bounce: the mailbox does not exist or the domain takes no mail
complaint The recipient marked the e-mail as spam
manual You added it, for example because the customer asked to stop receiving

Viewing, adding and removing

What you want In My MozOut Through the API
See the list Suppressions, on the Transactional e-mail page GET /v1/email/suppressions
Suppress an address Suppress an address POST /v1/email/suppressions, with email and a note
Remove one Unsuppress DELETE /v1/email/suppressions/{email}

For DELETE, the address is URL-encoded in the path: ana%40example.com instead of ana@example.com.

Do not remove addresses in a hurry. Take one off the list only when you know the problem is over: the customer fixed the mailbox, or asked to receive again. A spam complaint removed for no reason counts against you again.

When every recipient is suppressed

If every recipient of an e-mail is on the list, nothing is sent or charged: the API answers 422 with the reason all_recipients_suppressed. It is a sign your system holds an old address for that customer.

Keep your system up to date. When a send comes back with addresses in suppressed, flag them in your system and ask the customer for a new address next time they sign in.

Is an address suppressed that should not be? Open a support ticket.

Open a support ticket

SEE ALSO

Transactional e-mail statuses: sent, delivered, bounced, complained and failed explained

Email Center statistics: delivery, bounce and complaint rates, and what they tell you

To, Cc, Bcc and Reply-To in transactional e-mail: how many recipients and what each one costs

A new domain sending e-mail: how to build a reputation without landing in spam

Your domain or IP is on a blacklist: how to check and how to get off it

Bounce message 550: user unknown, relay denied and rejected, what each one means

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