Author: Alan J. Flavell Date: To: Exim users list Subject: Re: [Exim] 451-Invalid HELO
On Wed, 28 Apr 2004, Tom Playford wrote:
> I have spoken to computing-services at Oxford at they say it's a
> fault at my end. This is strange as
> I haven't changed my configuration or upgraded exim for months.
Not strange at all. There's no *guarantee* that every error and
RFC-violation will get diagnosed by the other MTA. Perhaps they
noticed the increasing number of spammers and other ne'er-do-wells who
present underscores in their HELO string, and decided to apply the
syntax rules more tightly.
