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Send emails by connecting to smtp server+attachments, using android javamail and ios mailcore2


Version published
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Getting started

$ npm install react-native-smtp-mailer --save

If you use RN version less than 0.60, then you need to link the native modules, either automatically or manually

Link Instructions for RN versions less than 0.60

Mostly automatic installation

$ react-native link react-native-smtp-mailer

Manual installation

  1. In XCode, in the project navigator, right click LibrariesAdd Files to [your project's name]
  2. Go to node_modulesreact-native-smtp-mailer and add RNSmtpMailer.xcodeproj
  3. In XCode, in the project navigator, select your project. Add libRNSmtpMailer.a to your project's Build PhasesLink Binary With Libraries
  4. Run your project (Cmd+R)<

Inside ios folder, if Podfile doesn't exist, create a Podfile with pod init. And add the following inside your Podfile:

pod 'mailcore2-ios'

Then run:

pod install
  1. Open up android/app/src/main/java/[...]/MainApplication.java
  • Add import com.rnsmtpmailer.RNSmtpMailerPackage; to the imports at the top of the file
  • Add new RNSmtpMailerPackage() to the list returned by the getPackages() method
  1. Append the following lines to android/settings.gradle: include ':react-native-smtp-mailer' project(':react-native-smtp-mailer').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-smtp-mailer/android')
  2. Insert the following lines inside the dependencies block in android/app/build.gradle: implementation project(':react-native-smtp-mailer')

Extra steps


Maybe you need to add (if you encounter error with mimetypes during build), in android/app/build.gradle:

android { ... packagingOptions { exclude 'META-INF/mimetypes.default' exclude 'META-INF/mailcap.default' } }


import RNSmtpMailer from "react-native-smtp-mailer"; RNSmtpMailer.sendMail({ mailhost: "smtp.gmail.com", port: "465", ssl: true, // optional. if false, then TLS is enabled. Its true by default in android. In iOS TLS/SSL is determined automatically, and this field doesn't affect anything username: "usernameEmail", password: "password", fromName: "Some Name", // optional replyTo: "usernameEmail", // optional recipients: "toEmail1,toEmail2", bcc: ["bccEmail1", "bccEmail2"], // optional subject: "subject", htmlBody: "<h1>header</h1><p>body</p>", attachmentPaths: [ RNFS.ExternalDirectoryPath + "/image.jpg", RNFS.DocumentDirectoryPath + "/test.txt", RNFS.DocumentDirectoryPath + "/test2.csv", RNFS.DocumentDirectoryPath + "/pdfFile.pdf", RNFS.DocumentDirectoryPath + "/zipFile.zip", RNFS.DocumentDirectoryPath + "/image.png" ], // optional attachmentNames: [ "image.jpg", "firstFile.txt", "secondFile.csv", "pdfFile.pdf", "zipExample.zip", "pngImage.png" ], // required in android, these are renames of original files. in ios filenames will be same as specified in path. In a ios-only application, no need to define it }) .then(success => console.log(success)) .catch(err => console.log(err));

RNFS is from react-native-fs library, used just to demonstrate a way of accessing files in phone filesystem.


mailhost: string

The smtp provider host. i.e: "smtp.gmail.com"

port: string

The port that the smtp provider listens to, i.e: "465"

username: string`

The username to authenticate with stmp host, i.e: "[email protected]"

password: string

The password to authenticate with stmp host

recipients: string

Comma separated values if want to add multiple recipients i.e: "[email protected],[email protected]"

subject: string

The subject of the email

htmlBody: string

The body of the email. i.e: "<h1>Sample Header</h1><p>Lorem ipsum dolor sit amet...</p>"

fromName?: string

Alias of the username email address, to be shown in the recipients as the sender's name. By default it's the same as the username field i.e: "[email protected]" Note: This is different than the reply-to email address. If reply-to is not specified, the reply-to will still use the username email

replyTo?: string

If not specified, the reply-to email is the username one i.e: "[email protected]"

ssl?: boolean

In iOS TLS/SSL is determined automatically, so either true or false, it doesn't affect it

By default it is true in android. If false then TLS is enabled.

bcc?: Array<string>

Optional list of bcc emails i.e: ["[email protected]", "[email protected]"]

attachmentPaths?: Array<string>

Optional path URIs of files that exist to the filesystem in the specified path, and want to be send as attachments i.e: [RNFS.DocumentDirectoryPath + "/sample_test.txt"]

attachmentNames?: Array<string>

Required if attachmentPaths are set, Only for android The sending attachments filenames, will be renamed by these. It's important to set these, otherwise they are not always shown in the received email i.e: ["renamed_sample_test.txt"] or ["sample_test.txt"] etc

Usage with Proguard

Add the following into android/app/proguard-rules.pro

-dontshrink -keep class javax.** {*;} -keep class com.sun.** {*;} -keep class myjava.** {*;} -keep class org.apache.harmony.** {*;} -dontwarn java.awt.** -dontwarn java.beans.Beans -dontwarn javax.security.** -dontwarn javax.activation.**




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