I'm trying to sync Emacs sendmail.el with mail-lib, and it seems that the Emacs version RFC 2047 encodes non-ASCII user names. So unless mail-lib require the gnus package (which is bad), some files would need to be moved from the gnus package into the mail-lib package, namely at least the following (determined by looking at `require' lines, but there may be hidden dependencies): rfc2047.el qp.el mm-util.el ietf-drums.el time-date.el parse-time.el mail-prsvr.el The rfc2047.el file would probably need modifications to work without the following files as well: gnus-util.el nnheader.el What do you think, especially the gnus package maintainer? MIME is probably a Pandora's box that will drag in lots of files into mail-lib, but it is probably inevitable unless we want `M-x mail' to be a ASCII-only thing, which I think is wrong. What could be a problem though, is if some MIME related package requires Mule, but I don't think this is the case.