Accepting messages based on EHLO argument

[ietf-svn-bot]

owner:todd.herr@valimail.com type_defect | by vesely@tana.it

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In Section 4.1.4, the 6th paragraph says:

   An SMTP server MAY verify that the domain name argument in the EHLO
   command actually corresponds to the IP address of the client.
   [[CREF13: [5321bis] [[Note in draft -- proposed change to "An SMTP
   server MAY verify that the domain name argument in the EHLO command
   has an address record matching the IP address of the client." --David
   MacQuigg, david_macquigg@yahoo.com, Friday, 20090130 0637 -0700]]]]
   However, if the verification fails, the server MUST NOT refuse to
   accept a message on that basis.  Information captured in the
   verification attempt is for logging and tracing purposes.  Note that
   this prohibition applies to the matching of the parameter to its IP
   address only; see Section 7.9 for a more extensive discussion of
   rejecting incoming connections or mail messages.

In Septembr 2020, a discussion in ietf-smtp[*] seemed to reach consensus on relaxing that MUST NOT to SHOULD NOT, for port 25 relaying. That was recalled later in an emailcore message[†].

[*] https://mailarchive.ietf.org/arch/msg/ietf-smtp/ABAL9xbBFTTlZ83lmU5XpyRRGPE [†] https://mailarchive.ietf.org/arch/msg/emailcore/rX4A8_mILuijOt3RzeSMXAq5op0

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Issue migrated from trac:47 at 2022-01-31 12:37:38 +0000

[ietf-svn-bot]

@todd.herr@valimail.com set owner to todd.herr@valimail.com

[ietf-svn-bot]

@todd.herr@valimail.com commented

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Compare with/link to ticket #19

[ietf-svn-bot]

@todd.herr@valimail.com commented

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This is a duplicate of ticket #19; same paragraph under discussion there.

Consensus is to move everything after the first sentence to the Applicability Statement.

[ietf-svn-bot]

@todd.herr@valimail.com changed component from smtp to email-applicability-statement

[ietf-svn-bot]

@todd.herr@valimail.com changed status from new to closed

[ietf-svn-bot]

@todd.herr@valimail.com set resolution to duplicate