Send emails with Swift

The Swift 6 SDK supports macOS, iOS, tvOS, watchOS, visionOS, and Linux. Its class-based client uses https://api.signal.apollodeploy.com by default. Before you start, create an API key with Emails: Send permission and verify the From domain.

Add the package

In Xcode, add https://github.com/Apollo-Deploy/signal-sdks as a package dependency and select the ApolloSignal product from version 4.0.1 or later.

Store your API key

Load the key from your server or command-line process environment. Never ship a Signal API key in an iOS or other client application binary.

Send an email from a trusted process

import ApolloSignal

let apiKey = ProcessInfo.processInfo.environment["SIGNAL_API_KEY"]!
let signal = try ApolloSignalApi(
    configuration: ClientConfig(
        defaultHeaders: ["Authorization": "Bearer \(apiKey)"]
    )
)

let email = try await signal.emails.sendEmail(
    body: SendEmailRequest(
        from: "auth@mail.company.com",
        to: ["alex@example.com"],
        subject: "Reset your password",
        text: "Use the secure link in your account to choose a new password."
    )
)

print(email.id)

The package can compile for Apple platforms, but API keys must remain in a trusted backend or operator-controlled tool. Mobile applications should call your backend, not Signal directly.

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Manage emails

Follow message states and delivery timelines.

Getting started

Dashboard

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Migration

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Manage emails