mailtrap-setting-up-sending-domain
Add or verify a Mailtrap sending domain, troubleshoot DNS propagation, publish SPF/DKIM/DMARC records, and complete compliance.
Setting up a Mailtrap sending domain
Overview
You must add and verify a domain you control before live sending. Mailtrap shows every DNS record required for that domain in the UI: add the complete set as given (do not cherry-pick). After DNS verifies, complete the compliance step if requested.
Subdomain vs root: add the exact hostname you will use in the From address. If you send from notifications.mycompany.com, add that subdomain as the sending domain—not only mycompany.com, unless you truly send from the root domain.
For step-by-step clicks at common hosts, open the matching guide on Sending domain setup (Cloudflare, Route 53, etc.) and follow it alongside the live UI values.
Related skills: mailtrap-sending-emails (after domain is ready).
When to use
- New Sending Domains setup, stuck verification, or compliance questions
- DNS at Cloudflare, AWS, Google, Namecheap, GoDaddy, DigitalOcean, etc.
When not to use
- Sandbox-only testing without a custom domain (see
mailtrap-testing-with-sandbox)
Authorization
The Sending Domains API calls below need Authorization: Bearer $MAILTRAP_API_TOKEN and an $MAILTRAP_ACCOUNT_ID in the path. Resolve $MAILTRAP_ACCOUNT_ID from GET https://mailtrap.io/api/accounts, and store tokens in environment
Subscribers only
The full skill, its 1 bundled files and every download is included with every paid Complete AI plan.
Details
| Source | community |
|---|---|
| License | — |
| Risk label | critical ("critical" means the skill may run commands or touch files — read before use) |
| Files | SKILL.md |
| Added | 2026-06-19 |
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