On Fri, 10 Oct 1997, Philip Hazel wrote:
> On Thu, 9 Oct 1997, Tom wrote:
>
> > Exim seems to have a problem with quoting. The following shows that
> > Exim verifies tom@??? as correct, but not "tom"@???, even though
> > they are the same thing, just that the local part is quoted.
>
> Yes. I confess to confusion over this issue. My confusion stems partly
> from the differences between RFC822 and RFC821. I implemented the
> current code very early in Exim's life, and have never re-visited it.
> Clearly I should.
Confusion between RFC 821 and 822 is a big problem. The fact that RFC
822 is considerably more complex, and uses a non-BNF grammar doesn't help
much.
Some MTAs (ex. Zmailer) attempt strict RFC821 checking. Telnet to
nic.funet.fi, port 25 and try a "rcpt to:<someguy.@nic.funet.fi>". It
does an immediate rejection. Another related point: Exim seems to have a
problem with the multi-line 501 response to "rcpt to" and interprets it as
a timeout problem and retries the message later. I haven't fully
investiagated this yet.
> --
> Philip Hazel University Computing Service,
> ph10@??? New Museums Site, Cambridge CB2 3QG,
> P.Hazel@??? England. Phone: +44 1223 334714
Tom
Systems Support
SDF
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