Sending domains
Settings → Domains.
A domain has to be verified in SES before anything can be sent from it. Mailroom creates the SES identity for you and shows the DNS to publish.
Adding one
Type the domain in and press add. The screen then lists the records — one click copies each. Publish them at your DNS host and the status moves to verified on its own, usually within minutes.
Domains already verified in SES import themselves the first time you open the page. You do not have to add them again.
What the records are for
| Record | Why |
|---|---|
Three CNAMEs, …_domainkey | DKIM. Signs your mail so receivers can tell it really came from you |
| MX and TXT on the mail-from subdomain | The return path, so bounces come back to SES rather than to nothing |
| TXT SPF | Says SES is allowed to send for this domain |
| TXT DMARC | Tells receivers what to do when a message fails the two above |
SPF and DMARC are probed by Mailroom itself rather than by SES, so the ticks next to them mean "we can see it resolving in DNS".
Subdomains are free
A subdomain of a domain you have already verified needs nothing. Add billing.example.com under a verified example.com and it is ready immediately — SES inherits verification downwards, and Mailroom records it as covered by its parent.
Such a domain shows no records of its own, because there are none to publish.
Delivery reporting
Press Set up delivery reporting on the same screen. It creates the SNS topic, wires SES to it, and subscribes your instance.
One manual step follows: set
SES_CONFIGURATION_SET=mail-eventsin your environment and redeploy. SES only reports on a message that was sent with a configuration set attached, and that variable is what attaches it. Without it, every message stays at sent forever.
The panel shows the topic ARN if you also want to pin SES_SNS_TOPIC_ARN so only that topic is accepted.
The sending limit
The strip at the top of the page shows your SES quota.
It is a rolling 24-hour window, not a daily allowance. There is no reset at midnight: each message stops counting exactly 24 hours after it was sent. When you are close to the cap, Mailroom shows when the oldest message in the window ages out, which is when headroom comes back.
A brand-new SES account is in the sandbox: 200 messages a day, and only to addresses you have verified. Ask AWS for production access before you rely on it.