[1] [CITE@en[RFC 5965 - An Extensible Format for Email Feedback Reports]] ([TIME[2014-12-21 09:40:25 +09:00]] 版) <http://tools.ietf.org/html/rfc5965>

[2] [CITE[RFC Errata Report]]
([TIME[2015-01-30 18:25:13 +09:00]] 版)
<http://www.rfc-editor.org/errata_search.php?rfc=5965>

[3] [CITE@en[RFC 6650 - Creation and Use of Email Feedback Reports: An Applicability Statement for the Abuse Reporting Format (ARF)]]
([TIME[2014-11-23 16:28:40 +09:00]] 版)
<http://tools.ietf.org/html/rfc6650>