Re: [Exim] require verify = header_syntax

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Autor: Alan J. Flavell
Data:  
Para: Exim users list
Assunto: Re: [Exim] require verify = header_syntax
On Fri, 25 Jun 2004, Jethro R Binks wrote:

> I am also unsympathetic. I get occasional queries, usually the
> "Undisclosed recipients" thing.


Here on our departmental mailer, we reject a moderate number of mails
which present that broken header, but (strangely?) I don't recall
anyone complaining about it. So the mails can't have been very
important :-)

Our ACL snippet reads:

  deny    !verify = header_syntax
   message = Your message headers contain invalid syntax: $acl_verify_message\n\


[etc...]

and yes, I think you need smtp_return_error_details = true in order
to make that work; at least we did set it true, with a comment that is
citing
http://www.exim.org/pipermail/exim-users/Week-of-Mon-20030428/053243.html

*However*, I have to admit that the above "deny" is preceded by an
"accept senders = ..." with a shortlist of senders whose MTAs were
fundamentally broken but it was politically expedient to us to accept
their mail. As best I can recall, none of them were for the
"Undisclosed recipients" thing, however.

all the best