Using mandrill (mailchimp) service to send emails

config.py

from application.mail import mail_send

...

SECURITY_SEND_MAIL_FUNCTION = mail_send

...

FROM_EMAIL = 'dispatch@site.ru'
FROM_NAME  = u'Site Admin'
EMAIL_ARCHIVE = 'mail-archive@site.ru'

mail.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from flask import current_app

from mailsnake import MailSnake

mandrill_api = MailSnake('api_key', api='mandrill')

def mail_send(subject, recipient, template, **kwargs):

    if template == 'welcome':
        send_welcome(**kwargs)
    elif template == 'confirmation_instructions':
        send_confirmation_instructions(**kwargs)
    elif template == 'login_instructions':
        send_login_instructions(**kwargs)
    elif template == 'reset_instructions':
        send_reset_instructions(**kwargs)
    elif template == 'reset_notice':
        send_reset_notice(**kwargs)
    else:
        return NotImplemented

def send_welcome(**kwargs):
    context = {}
    context['template_name'] = 'welcome'
    context['template_content'] = []
    context['message'] = {"subject": u"Site.ru - Thanks for registration :)",
                          "from_email": current_app.config.get('FROM_EMAIL'),
                          "from_name":  current_app.config.get('FROM_NAME'),
                          "to":[{"email": kwargs['user'].email}],
                          "track_opens":True,
                          "track_clicks":True,
                          "auto_text":True,
                          "url_strip_qs":False,
                          "preserve_recipients":False,
                          "bcc_address": current_app.config.get('EMAIL_ARCHIVE'),
                          "merge_vars":[
                              {
                                  "rcpt": kwargs['user'].email,
                                  "vars":[{"name": "CONFIRMATION_LINK", "content": kwargs['confirmation_link']}]}],

                          "tags":["welcome"],

                          "recipient_metadata": [{
                              "rcpt": kwargs['user'].email,
                              "values": [{ "user_id": kwargs['user'].id}]}]
                         }

    mandrill_api.messages.send_template(**context)


def send_confirmation_instructions(**context):
    pass

def send_login_instructions(**context):
    pass

def send_reset_instructions(**context):
    pass

def send_reset_notice(**context):
    pass