This is a SMTP backend for Lager. It allows you to send email messages out of lager via SMTP server.

This backend is configured using proplist with contents similar to the following example:

{lager_smtp_backend, [
	{level, error},
	{to, [<<"[email protected]">>]},
	{relay, <<"smtp.example.com">>},
	{username, <<"[email protected]">>},
	{password, <<"secret_password">>},
	{port, 587},
	{ssl, true},
	{flush_interval, 20000}
]}

Note that to is a list of recipients, that is mandatory. Optional arguments are only level, port and ssl, example shows defaults.