mandrillSendMail.js

var sendEmail = function(settings) {
    //attachmentName should be the full name. Example: reikningur.pdf

    var s = {
        from: settings.from,
        replyTo: settings.replyTo,
        to: settings.to,
        subject: settings.subject,
        body: settings.body,
        attachment: settings.attachment,
        attachmentName: settings.attachmentName,
        attachmentType: settings.attachmentType
    }

    var allEmailsValid = true;

    //to variable can be a string or an array of strings
    var recipients = [];
    if (s.to.constructor === Array) {
        $.each(s.to, function(key, value) {
            if (!_isValidEmail(value)) allEmailsValid = false;
            recipients.push({ 'email': value });
        });
    } else {
        recipients.push({ 'email': s.to });
    }

    var m = new mandrill.Mandrill('hBA_uid-xHuZ68IaJs8LXQ');

    var params = {
        message: {
            from_email: s.from || 'seatours@lendingar.is',
            headers: {
                'Reply-To': s.replyTo || 'lendingar@lendingar.is'
            },
            to: recipients,
            subject: s.subject,
            html: s.body,
            autotext: true, //turns html content to plaintext if mailclient does not support html
            track_opens: true,
            track_clicks: true
        }
    };

    if (s.attachment) {
        params.message.attachments = [{
            type: s.attachmentType,
            name: s.attachmentName,
            content: s.attachment,
        }];
    }

    m.messages.send(params, function(rsp) {
        return rsp;
    }, function(error) {
        console.log(error);
    });
}