zilinlin/RFC2PSM huggingface dataset:
Section 9. Acknowledgments

Many people contributed to the development of RFC 2821.  That
   document should be consulted for those acknowledgments.  For the
   present document, the editor and the community owe thanks to Dawn
   Mann and Tony Hansen who assisted in the very painful process of
   editing and converting the internal format of the document from one
   system to another.
   Neither this document nor RFC 2821 would have been possible without
   the many contribution and insights of the late Jon Postel.  Those
   contributions of course include the original specification of SMTP in
   RFC 821.  A considerable quantity of text from RFC 821 still appears
   in this document as do several of Jon's original examples that have
   been updated only as needed to reflect other changes in the
   specification.
   Many people made comments or suggestions on the mailing list or in
   notes to the author.  Important corrections or clarifications were
   suggested by several people, including Matti Aarnio, Glenn Anderson,
   Derek J. Balling, Alex van den Bogaerdt, Stephane Bortzmeyer, Vint
   Cerf, Jutta Degener, Steve Dorner, Lisa Dusseault, Frank Ellerman,
   Ned Freed, Randy Gellens, Sabahattin Gucukoglu, Philip Guenther, Arnt
   Gulbrandsen, Eric Hall, Richard O. Hammer, Tony Hansen, Peter J.
   Holzer, Kari Hurtta, Bryon Roche Kain, Valdis Kletnieks, Mathias
   Koerber, John Leslie, Bruce Lilly, Jeff Macdonald, Mark E. Mallett,
   Mark Martinec, S. Moonesamy, Lyndon Nerenberg, Chris Newman, Douglas
   Otis, Pete Resnick, Robert A. Rosenberg, Vince Sabio, Hector Santos,
   David F. Skoll, Paul Smith, and Brett Watson.
   The efforts of the Area Directors -- Lisa Dusseault, Ted Hardie, and
   Chris Newman -- to get this effort restarted and keep it moving, and
   of an ad hoc committee with the same purpose, are gratefully
   acknowledged.  The members of that committee were (in alphabetical
   order) Dave Crocker, Cyrus Daboo, Tony Finch, Ned Freed, Randall
   Gellens, Tony Hansen, the author, and Alexey Melnikov.  Tony Hansen
   also acted as ad hoc chair on the mailing list reviewing this
   document; without his efforts, sense of balance and fairness, and
   patience, it clearly would not have been possible.
Section Appendix E. Other Gateway Issues

In general, gateways between the Internet and other mail systems
   SHOULD attempt to preserve any layering semantics across the
   boundaries between the two mail systems involved.  Gateway-
   translation approaches that attempt to take shortcuts by mapping
   (such as mapping envelope information from one system to the message
   header section or body of another) have generally proven to be
   inadequate in important ways.  Systems translating between
   environments that do not support both envelopes and a header section
   and Internet mail must be written with the understanding that some
   information loss is almost inevitable.