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I have been reading RFC2821.
In 4.1.1.1 it says (this is new material which was not in 821):
In situations in which the
SMTP client system does not have a meaningful domain name (e.g., when
its address is dynamically allocated and no reverse mapping record is
available), the client SHOULD send an address literal (see section
4.1.3), optionally followed by information that will help to identify
the client system.
However reading the syntax carefully, I can see no specification for the
optional information. The ABNF specifies just a domain or an address
literal :-(
I suspect this means that sending such optional information would be
unwise ? and also that this last clause "optionally followed..." should
be removed as the standards process proceeds ??
- --
richard richard.clayton @ h i g h w a y m a n . com
"Assembly of Japanese bicycle require great peace of mind" quoted in ZAMM
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