Email Validation & Verification in Swift

A lightweight check (no SMTP probe): validates syntax, confirms the domain has MX records, and flags disposable/throwaway providers. Use it inline on sign-up forms.

let client = IpApiClient(apiKey: ProcessInfo.processInfo.environment["IP_API_IO_KEY"]!)

let info = try await client.emailInfo(email: "user@example.com")

print(info.syntax.isValid) // true
print(info.isDisposable)   // false
print(info.hasMxRecords)   // true
if let record = info.mxRecords.first {
    print(record.hostname)
}

Advanced verification that connects to the mail server to confirm the mailbox is deliverable, and adds role-account, free-provider, catch-all and Gravatar signals.

let result = try await client.validateEmail(email: "user@example.com")

print(result.reachable) // "yes" | "no" | "unknown"
if let smtp = result.smtp {
    print(smtp.deliverable, smtp.catchAll)
}
print(result.disposable)  // false
print(result.roleAccount) // false  (e.g. info@, support@)
print(result.free)        // false  (e.g. gmail.com)
if let suggestion = result.suggestion {
    print(suggestion)     // typo fix, e.g. "user@gmail.com"
}

Advanced-validate up to 100 addresses in one request — the building block for email list cleaning. Throws if the array is empty or longer than 100.

let batch = try await client.validateEmailBatch(
    emails: ["user@example.com", "fake@mailinator.com"])

print(batch.totalProcessed)        // 2
print(batch.successfulValidations) // 2

for (email, result) in batch.results {
    print(email, result.reachable, result.disposable)
}