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Questions · Published 2026-09-29 · Updated 2026-09-29 · AgentiSend

How do I verify a sending domain on IONOS?

To verify a sending domain on IONOS, publish every required row from `GET /domains/{id}/setup` on the DNS screen, then call `POST /domains/{id}/verify`. The clicks below are IONOS's, fetched on 29 September 2026.

To verify a sending domain on IONOS, publish every required row from GET /domains/{id}/setup on the DNS screen, then call POST /domains/{id}/verify. The steps in the next section are the ones IONOS documents, fetched on 29 September 2026.

The records to publish

POST /domains registers the name. GET /domains/{id}/setup returns one row per record, with record, host, type, value, priority, and required. A TXT row also has value_strings and value_bind. Paste those. The DKIM value is the one on the row.

A new domain sends once the required rows resolve. Domains and DNS names them: the DKIM TXT, and the return-path MX and TXT. Root SPF and DMARC are recommended. A tracking CNAME is on the sheet only when tracking is available, and it never blocks verification. If host is @, that row is the apex. If the apex already has an SPF TXT, merge the sheet's value into that one record. A second SPF TXT on the same name invalidates both.

curl -sS -X GET https://api.agentisend.com/domains/9c8f8f0e-3d1a-4d3f-9a1e-2b7c1a0f5e42/setup \
  -H "Authorization: Bearer $AGENTISEND_API_KEY"
200
{
  "commands": {
    "cloudflare": [],
    "gcloud": [],
    "route53": {}
  },
  "deep_link": "example",
  "detected": false,
  "domain": "example",
  "nameservers": [],
  "provider": {
    "dnsConsoleUrl": "example",
    "id": "example",
    "name": "example"
  },
  "provider_hints": {
    "cloudflare": "example",
    "godaddy": "example",
    "namecheap": "example",
    "route53": "example"
  },
  "records": [],
  "zone": "example",
  "zone_file": "example"
}
Response

IONOS's dashboard, as of 29 September 2026

Managing TXT records says: for the domain, click the gear under Actions and select DNS, click Add Record, select TXT, put the host in Host name (@ or the row's host), put the text in Value, then click Save. The same article says the default TTL makes the setting active immediately, and that @ is the wildcard it documents for the host field. An MX row uses the same DNS screen and the type on the sheet; that TXT article does not list MX field labels, so this page does not invent them. capturedOn: 2026-09-29.

Read it back

POST /domains/{id}/verify reports which required rows resolved. GET /domains/{id} is the sheet with each row's status.

Other registrars

Written by the AgentiSend team.