RFC 5821 seems rather elusive. Where can one not in the know find a copy?
On Wed, Apr 18, 2018 at 3:40 PM, Jeremy Harris <j...@wizmail.org> wrote:
> On 18/04/18 23:03, Michael Wise via mailop wrote:
> > Sorry, what section of 2821?
>
> 5821 has
>
>
> 4.4. Trace Information
> "MUST insert trace ("time stamp" or "Received")"
>
> "The FROM clause, which MUST be supplied in an SMTP environment,
> SHOULD contain both (1) the name of the source host as presented
> in the EHLO command and (2) an address literal containing the IP
> address of the source, determined from the TCP connection."
>
>
> 4.1.3. Address Literals
> "For IPv4 addresses, this form uses four small decimal integers
> separated by dots and enclosed by brackets such as [123.255.37.2]"
>
> --
> Cheers,
> Jeremy
>
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