Re: [exim] syntactically invalid argument(s)

On Wed, 24 Nov 2004, John W. Baxter wrote:

> You either convince the people who run server_notes3.almuni.iae.edu.ar to
> rename their server with a name which is valid for use as an email server
> (no underscore) or, more likely, you give in and set the option
> helo_allow_chars = _
> In the main part of the Exim configuration.

I'd rather except from this test the *few* sites that we have an
overwhelming business need to accept mail from in spite of their
violation of the RFCs, while continuing to reject from anyone else.

Fortunately, exim makes that easy to implement.

> There will follow here a longish discussion as to why it is wrong to
> "let" servers with improper names talk to your server, vs why it is
> wrong to reject messages that you or your user community want to
> receive.

Oh, I'll just refer to the mailing list archive for that, OK?

> Just ignore that, and pick one of the solutions above.

One or other of them, indeed. But "all" or "none" aren't the only
solutions.