The Email Center log: finding an e-mail, filtering it and why the content goes after 30 days

The short answer: every e-mail is logged: who it went to, when it left and what happened to it. You see it in the history on the Transactional e-mail page in My MozOut or with GET /v1/email/messages, filtered by status, dates and recipient. The content is kept for 30 days; after that only the log remains.

Finding an e-mail

Filter	Example
status	?status=bounced shows only bounces
from and to	?from=2026-11-01&to=2026-11-13, as YYYY-MM-DD
recipient	?recipient=ana@example.com, in to, cc or bcc
page and per_page	The list is paginated, newest first

The list does not include the content. To see the text and each recipient’s events, open the e-mail with GET /v1/email/messages/{id}.

What is kept, and for how long

Part	How long
Sender, recipients, subject, status, events, credits	Stays in the log
Content (html and text)	30 days. After that it is null

Why only 30 days: a transactional e-mail often carries personal data, such as names, amounts and addresses. Keeping the text forever would mean keeping that data for no reason.

The log is not your archive. If you need to prove what you sent a customer a year from now, keep the id, the date and the document in your own system. Or add an archive address of yours in bcc, knowing it counts as one more recipient.

When a customer says nothing arrived

1	Search by address with the recipient filter.

2	Look at the status. delivered means their server accepted it: ask them to check spam and other folders.

3	If it is bounced, read the event detail: it is often a mistyped address or a full mailbox.

4	If there is no e-mail at all, your system never asked for the send. Check your application’s logs.

Store each e-mail’s id next to the order or invoice in your system. It is the quickest way to find it later, and it is what our support will ask you for.

Need help working out what happened to an e-mail? Open a support ticket with the id.

Open a support ticket

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