Make the hostname (FQDN) configurable

[webdeb]

https://github.com/Vagabond/gen_smtp#option (hostname)

hostname the hostname to be used by the smtp relay, Defaults to: smtp_util:guess_FQDN(). The hostname on your computer might not be correct, so set this to a valid value.

A bad FQDN could make your emails be filtered out as spam.

[tgautier]

Hey, thanks for the PR, nice catch 😉

Could you please just add some tests for the configuration option you've just added?

You can have a look at smtp_adapter_test.exs for inspiration.

[webdeb]

Thank you @tgautier, I added the hostname option to the main config attribute and an assertion inside the assert_configuration function, I think this should be fairly enough =)

[tgautier]

Thanks! Looks good to me.

Waiting for @kdisneur 👍 then it's a go.

[kdisneur]

Thanks for the PR @webdeb! :)

Could you squash your commits before we merge?

[webdeb]

sqshd® :)

[webdeb]

One last question guys, what are the plans to release 1.5? Now I am including the develop branch, which is ok, but I also had problems with testing, I actually performed the tests with elixir 1.5 by manually patching the supported elixir version in mix.exs

[hisapy]

Hi guys,

Is there an estimated release date for this changes ?

Thanks in advance

[tgautier]

Done, sorry for the delay 😉