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Re: Last Call: draft-siemborski-rfc2554bis (SMTP Service Extension for Authentication) to Proposed Standard

2007-01-26 13:49:00
On Wed, 24 Jan 2007, The IESG wrote:
The IESG has received a request from an individual submitter to consider
the following document:

- 'SMTP Service Extension for Authentication '
  <draft-siemborski-rfc2554bis-07.txt> as a Proposed Standard


draft-siemborski-rfc2554bis does not appear to contain any text similar to the last paragraph of section 4 in the rfc1734bis draft, requiring servers to support a configuration that does not permit passive password snooping.

I disagree with the choice of DIGEST-MD5 as the mandatory-to-implement mechanism. Given that many of the other protocols likely to be used by an SMTP client, such as POP3, IMAP4rev1, and LDAP, have chosen to specify "TLS followed by a cleartext password authentication" as their MtI authentication method, specifying DIGEST-MD5 here seems like a needless difference. I see no reason to believe DIGEST-MD5 will be more deployable in SMTP/submission servers than in IMAP, POP3, or LDAP servers.


Philip Guenther

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