[Cialug] MTA HELO

[Kevin Smith]

That's my opinion as well. Relevant RFC is this I believe:
http://www.freesoft.org/CIE/RFC/1123/90.htm
On Jan 12, 2014 9:15 AM, "Paul Gray" <gray at cs.uni.edu> wrote:

> On 01/12/2014 08:47 AM, Kevin Smith wrote:
> > I'm I wrong? Postfix configured to reject connections from mail serves
> > whose HELO is not a FQDN. It doesn't try and resolve it. Stops a ton of
> > Spammers at the front door. This has not been an issue for 15 years.
> > Recently our payroll guys upgraded and now their mail server doesn't
> return
> > a FQDN. So, mail is rejected. I said set a FQDN even if it's made up.
> They
> > want me to Whitelist them; I'm pretty sure at this level Whitelisting
> isn't
> > an option. I'm not sure their system administrator knows what I'm talking
> > about.
>
> This behavior is part of the requirement for the HELO found in the RFCs.
> I think this topic has come up on the list before, so it's not too
> uncommon to find it causing problems.
>
> In fact, if you look in the archives for where my foot is in my mouth
> having claimed that there wasn't such a requirement in the RFC, that's
> where you'll find the particular citations.
>
> My suggestion is to urge them to fix their side, because, well, that's
> where the problem is.
>
> --
> Paul Gray                                         -o)
> 314 East Gym, Dept. of Computer Science           /\\
> University of Northern Iowa                      _\_V
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