Use env variables to set SMTP settings

[jarifibrahim]

Fixes #204

Note - The application will return an Internal Server Error if any of these variables are not set.

[coveralls]

Coverage remained the same at 72.269% when pulling 4c27cf1 on jarifibrahim:env-variable into 3741eed on OpenSourceHelpCommunity:predev.

[coveralls]

Coverage remained the same at 72.269% when pulling 3f4cd11 on jarifibrahim:env-variable into 3741eed on OpenSourceHelpCommunity:predev.

[jarifibrahim]

Closing this PR since we do not need email related features at the moment.

#224 makes this PR obsolete

[tapaswenipathak]

Register/Login is of no good use if we don't confirm the email. Currently we have it hidden on master, once we are up with check we would make it live. This is needed and cannot be removed. Did you get the chance to set it on Heroku? or does this not work for you? looks good.

[jarifibrahim]

@tapasweni-pathak There is a known issue with Gmail and Heroku. Heroku servers are located all around the world. When we try to send an email via Heroku server, Gmail blocks the request considering the unusual origin of the request. We could try and see if this works, but I'm not sure if this email verification via emails from gmail should be used on production.

[tapaswenipathak]

This happens with mutt too if you use it with Gmail, this needs to be set up in that case and we can restrict to heroku. Can you please drop a blog or something, as I'm aware about this but not about the known issue, thanks!

[jarifibrahim]

@tapasweni-pathak Let's merge this and see if it works. We'll never know until we try ;)

[coveralls]

Coverage remained the same at 72.269% when pulling 3f4cd11 on jarifibrahim:env-variable into 3741eed on OpenSourceHelpCommunity:predev.