meteor/docs/client/full-api/api/email.md

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<h2 id="email"><span>Email</span></h2>

The `email` package allows sending email from a Meteor app. To use it, add the
package to your project with `$ meteor add email`.

The server reads from the `MAIL_URL` environment variable to determine how to
send mail. Currently, Meteor supports sending mail over SMTP; the `MAIL_URL`
environment variable should be of the form
`smtp://USERNAME:PASSWORD@HOST:PORT/`. For apps deployed with `meteor deploy`,
`MAIL_URL` defaults to an account (provided by
[Mailgun](http://www.mailgun.com/)) which allows apps to send up to 200 emails
per day; you may override this default by assigning to `process.env.MAIL_URL`
before your first call to `Email.send`.

If `MAIL_URL` is not set (eg, when running your application locally),
`Email.send` outputs the message to standard output instead.

{{> autoApiBox "Email.send"}}

You must provide the `from` option and at least one of `to`, `cc`, and `bcc`;
all other options are optional.

`Email.send` only works on the server. Here is an example of how a
client could use a server method call to send an email. (In an actual
application, you'd need to be careful to limit the emails that a
client could send, to prevent your server from being used as a relay
by spammers.)

    // In your server code: define a method that the client can call
    Meteor.methods({
      sendEmail: function (to, from, subject, text) {
        check([to, from, subject, text], [String]);

        // Let other method calls from the same client start running,
        // without waiting for the email sending to complete.
        this.unblock();

        Email.send({
          to: to,
          from: from,
          subject: subject,
          text: text
        });
      }
    });

    // In your client code: asynchronously send an email
    Meteor.call('sendEmail',
                'alice@example.com',
                'bob@example.com',
                'Hello from Meteor!',
                'This is a test of Email.send.');


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