Make sending email work

[wvengen]

Foodsoft sends mail messages, so we need a way to send them properly.
Add an email server docker instance that acts as a relay for Foodsoft. This email server can then either forward it to an upstream server, or just deliver it by itself (in which case we'll need to setup some anti-spam measures like SPF and such).
It would be useful to keep #2 in mind, where we'll also need to route incoming mail (see also links there).
Multiple domains as well as wildcard email addresses (but not catch-all, I guess) will be necessary.

[kidhab]

I'm not familar with docker right now but I like to setup postfix. So I self assign me to this task.

[wvengen]

There's a good starting point in 561cd12 (PR #17) (albeit with a lot more than this issue is strictly about). Hope this helps to get started.

[wvengen]

Is this getting anywhere?
As a first step, we could set the smtp server details in env variables in the Rails apps. But in the end I'd prefer to have a front-end postfix who does the routing.

[wvengen]

We can use Sense.Lab's SMTP, for details see mailing list post.

[wvengen]

It would still be nice to have postfix in between. Is someone working on that, or shall we close the issue and leave it for #2?

[wvengen]

Let's leave adding postfix for #2 then.

[wvengen]

We're having too many TLS connections- http://foodsoft.51229.x6.nabble.com/email-problems-tp1674.html

[kidhab]

Hi, Am Fri, 02 Mar 2018 02:22:59 -0800 schrieb wvengen <notifications@github.com>:

We're having too many TLS connections - http://foodsoft.51229.x6.nabble.com/email-problems-tp1674.html

The server's IP address (46.38.240.91) is now exlcuded from Postfix rate limiting. I suppose that this solves this error. steffen

[wvengen]

Thanks, that's great! 👍

[kidhab]

I discoverd another limit of the postfix server (Recipient address rejected: Rate limit reach, retry later ) - if a specified number of mails per day were exceeded postfix refused to deliver new mails.

I exluded the foodsoft server's IP address from this limit.