How to set content_transfer_encoding to something other than quoted-printable?

Hi all,

How do I set the content_transfer_encoding for mail with actionmailer to something other than quoted-printable? It's a setting with TMail which action mailer relies on in rails 2.3.*. I am trying to set it to utf8

I have tried: - mail = TMail::Mail.new; mail.transfer_encoding = "utf8"; - setting the @header["Content-Transfer-Encoding"] in the mailer's delivery method - various combinations of ActionMailer::Base.transfer_encoding = , content_transfer_encoding =, [:content_transfer_encoding], etc - all kinds of other craziness with encoding/decoding attempts

There is a comment here that there is a setting in the docs: ActionMailer weirdness: bad html '=3d' for all '=' - Rails - Ruby-Forum, but I cannot find it.

Anyone have any ideas? Anything is welcome. This one I've been stuck on for 5 hours now.