When #deliver_now is called all translations within the generated email will be looked up for the current I18n locale. I18n.locale = ‘de’ mail.deliver_now # Generates german email, correct In #enqueue_delivery the locale was not considered and the resulting job uses the default locale. I18n.locale = ‘de’ mail.deliver_later # Generate english email, incorrect In order to achieve a consistent behaviour the current locale is now always passed to `ActionMailer::DeliveryJob`.
Contrary to what the name suggests, PLAIN SMTP authentication is not sent in plain text but is Base64 encoded like the LOGIN method. Their difference is described in the third link below. * https://tools.ietf.org/html/rfc4954 * https://en.wikipedia.org/wiki/SMTP_Authentication * http://www.samlogic.net/articles/smtp-commands-reference-auth.htm
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Given the following templates: mailer/demo.html.erb mailer/demo.en.html.erb mailer/demo.pt.html.erb Before this change for a locale that doesn't have its related file the `mailer/demo.html.erb` will be rendered even if `en` is the default locale. Now `mailer/demo.en.html.erb` has precedence over the file without locale. Also, it is possible to give a fallback. mailer/demo.pt.html.erb mailer/demo.pt-BR.html.erb So if the locale is `pt-PT`, `mailer/demo.pt.html.erb` will be rendered given the right I18n fallback configuration. Fixes #11884.