What exactly does the Mailcheck domain check look at?

Validate Domain reports whether a domain is disposable, whether it has MX records, how old it is, and whether it carries spam indicators. That is how Lyro tells a throwaway signup apart from a legitimate address at a brand-new domain.

Can Lyro verify a whole list of addresses at once?

No. The toolkit checks one address and one domain per call, so Lyro uses it at the point an address is entered or questioned in a conversation. Bulk list validation stays in Mailcheck itself.

Will Lyro refuse to continue if verification fails?

No. It reports what came back and asks the customer to confirm or correct the address. If they insist the address is right, the conversation goes to a human agent with the verification result and the full history attached.

Is a failed domain check the same as an invalid address?

Not always. A domain can be a public or forwarding provider and still deliver mail, while a perfectly formed address at a disposable domain will not stay reachable for long. Lyro runs Verify Email Address and Validate Domain together so the two results can be read side by side.

Mailcheck MCP integration

Verifies an address and inspects its domain for MX records, age, and spam signals before a bad contact reaches your list.

Connect Mailcheck See all integrations

2actions available

What your agent can do with Mailcheck

Every action runs live through MCP. Nothing to build, nothing to maintain.

Verify email address
Lyro verifies emails instantly. Support teams catch invalid addresses before sending without bounce delays.
Validate domain
Lyro checks domains for disposability, MX records, and spam signals. Agents assess health without third-party tools.

See all 2 actions

How businesses use Mailcheck + Lyro

Each card is one request a support team gets, and the Mailcheck actions Lyro runs to close it.

Confirm an address before the confirmation email
Lyro verifies the address a customer typed into chat and asks them to correct it on the spot, so an order confirmation or password reset goes to a mailbox that actually accepts mail.
Verify Email AddressValidate Domain
Screen the domain behind a new signup
Lyro checks whether a signup domain is a temporary mail service, a public provider, or a forwarding address, and reads its MX records and age before the lead enters your list.
Validate DomainVerify Email Address
Diagnose a bounce a customer is complaining about
When a customer reports a missing email, Lyro re-runs the address and its domain and reports which of the two is at fault, so the reply names the actual problem.
Verify Email AddressValidate Domain

How it works

Get started in 3 steps

Connect once, then just ask. There is no workflow builder to learn and nothing to maintain — Lyro reads the Mailcheck actions it has and picks the ones a request needs.

01
Connect Mailcheck
Authorize the Mailcheck account your team already uses — one consent screen, no API keys, no mapping tables. Lyro can only do what you granted that account, and you can disconnect it at any time.
02
Tell your agent what you need
Describe the job the way you would hand it to a teammate. Lyro maps it to the Mailcheck actions that close it and chains as many as the request needs.
03
Watch it work
The agent runs the actions inside the conversation the customer is already in, so nobody copies data between tabs and your team can take over at any point.
Get started free

Mailcheck · Lyro

Everything else about Mailcheck

Setup, permissions, and the limits of what Lyro can do inside Mailcheck.

Validate Domain reports whether a domain is disposable, whether it has MX records, how old it is, and whether it carries spam indicators. That is how Lyro tells a throwaway signup apart from a legitimate address at a brand-new domain.