Posted over 5 years ago. Visible to the public.

E-Mail / SMTP-Relay

On every application server a local MTA is running and listening on localhost port 25. You can use it to send mails.

The advantage of using the local MTA is that mails are queued if they can't get delivered directly.

To get better message delivery you should configure a SPF Record Archive for all domains you use for sending mails.

If you already have a SPF record, please add to it. If you are not having a SPF record, please ask your email provider how to set it up. If you are not sure about what to do, you can also write us an email to

For example if you also use google apps with this domain you have to configure

v=spf1 -all

Does your version of Ruby on Rails still receive security updates?
Rails LTS provides security patches for unsupported versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2).

Owner of this card:

Thomas Eisenbarth
Last edit:
almost 3 years ago
by Kim Jahn
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Thomas Eisenbarth to opscomplete
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