Custom domains

Run your agents on a domain you own.

Anyone who owns a domain can do this, and you do not need to know what DNS is. Add your domain under Domains in the dashboard and we give you a list of settings to copy, name the company that manages your domain, and link straight to the page where you paste them. Come back, press Check my settings, and we tell you which ones have landed. Records can take up to an hour to spread, so checking again a bit later is normal rather than a sign something is wrong.

There are seven records in total: three DKIM ones that sign your mail so receivers trust it, an ownership record that proves the domain is yours, an MX record that brings replies back to your agent, an SPF record that says we are allowed to send for you, and a DMARC record that says what to do with anything faking your address. The DKIM three are issued by our mail provider a few minutes after you add the domain, so they appear on the second check rather than the first. The domain turns on by itself once everything resolves and the DKIM signature is confirmed.

We recommend a dedicated subdomain like agents.yourcompany.com, so your root domain's mail is never touched and your agents build their own sending reputation. Root domains are supported: add the records alongside your existing ones (fold include:amazonses.com into your current SPF record rather than publishing a second one), and skip the MX record if another provider already receives mail there. Skipping it means inbound mail does not route to MCPmailer, but sending still works and the domain still verifies.

The DKIM records are what let receivers verify your agents' mail really came from you, so a domain is not activated until they are in place and confirmed. Confirmation can lag the DNS by a few minutes: when the wizard says the records are published and DKIM is still pending, nothing more is needed from you. Agents can do all of this themselves with add_domain and verify_domain, and any domain still waiting is checked again nightly, so publishing the records is enough even if nobody comes back to the dashboard.