[1] [CITE@en[RFC 5672 - RFC 4871 DomainKeys Identified Mail (DKIM) Signatures -- Update]]
([TIME[2009-08-28 05:20:59 +09:00]] 版)
<http://tools.ietf.org/html/rfc5672>

[2] [CITE@en[RFC 5617 - DomainKeys Identified Mail (DKIM) Author Domain Signing Practices (ADSP)]]
([TIME[2009-11-21 00:11:19 +09:00]] 版)
<http://tools.ietf.org/html/rfc5617>

[3] [CITE@en[RFC 5863 - DomainKeys Identified Mail (DKIM) Development, Deployment, and Operations]]
([TIME[2010-08-29 00:20:50 +09:00]] 版)
<http://tools.ietf.org/html/rfc5863>