Hi,

Tech Gurus via Exim-users <[email protected]> (Di 10 Okt 2017 22:46:45 CEST):
…
> > > I tried to use helo_accept_junk_hosts = IP of the host  , still not
> > > working.  I put this directive just before the ACL configuration starts.
> >
> > That's the right option to be using; either you put it in the wrong
> > place or you didn't reload the config.

It seems, in src/smtp_in.c, that an *empty* HELO argument is
not permitted, even with helo_accept_junk_hosts set. An empty string
can't even be junk.

Maybe this can be fixed/adjusted.

    Best regards from Dresden/Germany
    Viele Grüße aus Dresden
    Heiko Schlittermann
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