diff --git a/Heroku.md b/Heroku.md
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+[![Deploy][heroku_button]][heroku_deploy]
+
+[Heroku deployment quide needed](https://github.com/wekan/wekan/issues/693), [Deploy error](https://github.com/wekan/wekan/issues/638), [Problem with Heroku](https://github.com/wekan/wekan/issues/532)
+
+Email to work on already working Heroku: Use 3rd party email like SendGrid, update process.env.MAIL_URL ,
+change from email at Accounts.emailTeamplates.from , new file in server folder called smtp.js on code
+`Meteor.startup(function () });` . TODO: Test and find a way to use API keys instead.
+
+[heroku_button]: https://www.herokucdn.com/deploy/button.png
+[heroku_deploy]: https://heroku.com/deploy?template=https://github.com/wekan/wekan/tree/master
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