Re: [Exim] Help with acceping underscore in FROM:

Philip Hazel wrote:
> > RTFM .... helo_allow_chars = _
>
> No, that applies only to HELO arguments.
>
> The only way to fix up malformed SMTP commands, which is what this is,
> is to use an "SMTP time" rewrite. Check out the "S" flag for rewriting
> rules.

It is worth noting that a hostname containing '_' is illegal by DNS
RFC. Of course the only hosts that seem to use them are Microsoft
based OSes. :(

D.