SV: <NO_SPAM> tags in mail address

[Russ Allbery]

Christian Ejlertsen <chr.ejlertsen at has.dk> writes:

> Well just wondered how some news servers don't seem to mind using such a
> tag as reply adress, is there some sort of workaround or is it a
> "limitation" of the INND server ??

Not without source code modifications.

I don't believe this should be changed, as such an address is inherently
invalid and cannot be parsed.  In fact, if you pass it to sendmail, it's
likely to cause bizarre recursive rule errors (particularly if the angle
brackets end up being unbalanced); there are minorly invalid addresses and
there are catastrophically invalid addreses, and this is the latter.

There are plenty of other characters that could be used other than <> that
don't have extremely special meaning under RFC 2822.  - is probably the
most innocuous.

In other words, I don't consider this a limitation.  I consider news
servers which accept such addresses to be buggy.  Note that INN, following
the dictate of being conservative in what one generates and liberal in
what one accepts, will accept posts containing such addresses from other
servers but will not accept them in local postings.

-- 
Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>

    Please send questions to the list rather than mailing me directly.
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