Martin Stecher. Integrity, Privacy, and Security in Open Pluggable Edge Services (OPES) for SMTP. RFC, 4902:1-14, May 2007. [doi]
@article{rfc4902, title = {Integrity, Privacy, and Security in Open Pluggable Edge Services (OPES) for SMTP}, author = {Martin Stecher}, year = {2007}, month = {May}, doi = {10.17487/RFC4902}, url = {https://doi.org/10.17487/RFC4902}, researchr = {https://researchr.org/publication/rfc4902}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {4902}, pages = {1-14}, }