CRMs

Check email domains, domain age and links in Capsule CRM

Check the email domain behind every contact in Capsule CRM so your pipeline keeps working addresses and you can spot disposable, free-provider and role mailboxes before anyone writes to them.

Why the data matters in Capsule CRM

In Capsule a party record usually becomes a task, an opportunity and a follow-up reminder. When the email on that party sits on a throwaway domain or a domain with no mail records, the reminder still fires, the sales person still spends the time, and the opportunity still shows up in the pipeline report as if it were reachable.

What LookValid checks

LookValid checks for Capsule CRM
Product	What it does here	Credits
Email Domain Check	Reads MX, SPF and DMARC records for the domain of each party email and returns a good, risky or undeliverable signal. It looks at the domain only and never confirms that a single mailbox exists. Flags disposable domains, free mailbox providers and role mailboxes such as info@, so you can tag the party before it reaches an opportunity.	1 credit per address checked
Domain Age	Returns registration and expiry dates for the website domain on an organisation, so very new domains stand out in a review.	2 credits per registered domain (unregistered domains are free)
Link Safety Check	Checks the domain of a website URL against a published list of reported malicious domains. A domain that is not listed is not proof of safety.	1 credit per URL checked (a check that cannot run is free)

Connect it in four steps

Sign up for LookValid, then open your dashboard and add a new key under API keys.
Keep the key in the LOOKVALID_API_KEY environment variable on the server that runs the function, next to the Capsule personal access token you generate under My Preferences, API Authentication Tokens.
Call the function with the email of the party you are checking: a found:false answer means nothing could be read for that address, so leave the party untouched, and an error answer carries a code and a fix that you should log.
Send the three returned values to Capsule through its Update party operation, into custom fields named Email signal, Disposable domain and Role mailbox on the party.

A small Node function on your own server that you call for each party, either from a handler for Capsule REST hook deliveries or from a nightly loop over parties. The call is POST https://YOUR_API_HOST/v1/email-domain-check and costs 1 credit per address checked.

validateCapsuleEmail.mjs

1const API_URL = "https://YOUR_API_HOST/v1/email-domain-check";
2
3export async function validateCapsuleEmail(value) {
4  const response = await fetch(API_URL, {
5    method: "POST",
6    headers: {
7      Authorization: `Bearer ${process.env.LOOKVALID_API_KEY}`,
8      "Content-Type": "application/json",
9    },
10    body: JSON.stringify({
11      "email": value,
12    }),
13  });
14  const result = await response.json();
15  if (!response.ok) throw new Error(`${result.error.code}: ${result.error.fix}`);
16  if (!result.found) return null;
17  return {
18      "Email signal": result.data?.deliverability_signal ?? null,
19      "Disposable domain": result.data?.disposable ?? null,
20      "Role mailbox": result.data?.role_account ?? null,
21  };
22}

Where each response field goes in Capsule CRM
Response field	Goes into
data.deliverability_signal	Email signal
data.disposable	Disposable domain
data.role_account	Role mailbox

The recipe returns nothing when the lookup finds nothing, which costs no credits for this product, and stops with the error code and fix on a failed request.

Without code

If you would rather not host a function, an automation platform with a generic HTTP request step can do the same job without a dedicated app. Trigger on a new or updated party in Capsule, add an HTTP request step that posts the party email to the LookValid email-domain-check endpoint with your key in the Authorization header, then add a second Capsule step that writes the returned signal into a custom field on that party.

REST and MCPOne shared credit balance

Questions

What does a check cost in Capsule?

Each lookup uses the credits shown for the email-domain-check product on the pricing page.

Can this tell me whether a contact mailbox is real?

No. The check reads the domain: its mail records, whether it is disposable, free or a role address. It never contacts a mail server, so a good signal means the domain can receive mail, not that the person exists.

Where do the two keys go?

Both live as environment variables on the server that runs the function. LookValid uses the bearer key you create in your dashboard, and Capsule accepts a bearer token in the Authorization header of each request, which a personal access token can supply.

Sources

Capsule developer documentation, getting started and operations list https://developer.capsulecrm.com/, read 2026-10-18
Capsule developer documentation, authentication https://developer.capsulecrm.com/v2/overview/authentication, read 2026-10-18
LookValid API reference: Email Domain Check https://lookvalid.com/docs/api/email-domain-check, read 2026-10-18

LookValid is run by Meralume Labs. It is not connected to, endorsed by or a partner of any company or product named on this page, and every product name belongs to its owner.

LookValid bills every lookup in credits from one shared balance, so the same key works for each check above.

See Email Domain Check