Not correct. Mail address local parts are *case sensitive*. RFC5322 Section 3.4.1: """ The local-part portion is a domain-dependent string. """ RFC5321: """ 2.4. General Syntax Principles and Transaction Model [...] The local-part of a mailbox MUST BE treated as case sensitive. Therefore, SMTP implementations MUST take care to preserve the case of mailbox local-parts. In particular, for some hosts, the user "smith" is different from the user "Smith". However, exploiting the case sensitivity of mailbox local-parts impedes interoperability and is discouraged. Mailbox domains follow normal DNS rules and are hence not case sensitive. """ Discouraged != (MUST NOT || SHOULD NOT) We went through this argument (at my instigation) last year on the S/MIME list: http://osdir.com/ml/ietf.smime/2007-09/msg00004.html -- Tim >-----Original Message----- >From: owner-ietf-pkix@xxxxxxxxxxxx [mailto:owner-ietf-pkix@xxxxxxxxxxxx] >On Behalf Of Jim Schaad >Sent: Saturday, March 14, 2009 4:53 PM >To: 'Maxim Masiutin'; ietf-pkix@xxxxxxx >Cc: phoffman@xxxxxxx >Subject: RE: RFC4134 email mismatch in examples 4.8 and 4.9 > > >For the purposes of S/MIME all RFC822 addresses are considered to be >case >insensitive. > >Jim > > >> -----Original Message----- >> From: owner-ietf-pkix@xxxxxxxxxxxx [mailto:owner-ietf- >> pkix@xxxxxxxxxxxx] On Behalf Of Maxim Masiutin >> Sent: Saturday, March 14, 2009 2:22 PM >> To: ietf-pkix@xxxxxxx >> Cc: phoffman@xxxxxxx >> Subject: RFC4134 email mismatch in examples 4.8 and 4.9 >> >> Hello, >> >> I have a question about RFC4134, Examples 4.8 and 4.9. >> >> "From" line of the RFC-822 message is aliceDss@xxxxxxxxxxxx, while the >> certificate's SubjectAlternativeName contains Rfc822Name = >> AliceDSS@xxxxxxxxxxx >> >> So the two emails are different in the host part. >> >> Is it OK for them to be different? >> >> >> -- >> Best regards, >> Maxim Masiutin >> Ritlabs SRL >> http://www.ritlabs.com/
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