premailer-rails

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Allow ActionMailer to be lazy-loaded. Currently premailer-rails triggers the loading of ActionMailer during the bootstrapping, but it can be postponed until the mailer is actually used.

ActiveSupport is not a direct dependency of ActionMailer, but it has been required via indirect dependencies since version 3 (the earliest version supported by premailer-rails).

It would be nice to see this merged. Early loading of parts of the framework out of order can cause all sort of problems. Most notably overwriting / ignoring config defined in other initializers.

I need this PR. I'm trying to add a custom mailer interceptor after premailer-rails but It doesn't work.

Thanks!