Re: [Exim] Reaction to rude 554 greeting

Correct me if I am wrong, but if I remember my RFC's correctly doesn't
all 5xx errors refer to a permanent error?

Personally if I find a host that is blocked trying to connect to all my
mail servers, they get both listed in the firewall rules, and are null
routed.

Jason

On 15 Mar 2003 at 11:07, Florian Weimer wrote:

> "Suresh Ramasubramanian" <mallet@???> writes:
>
> >> Hmm, would you mind looking up the way SMTP is supposed to work?
> >> MTAs are expected to work this way. If no IP connection can be made
> >> to the first MX, other MXes should be tried. As a result, SMTP mail
> >> delivery is extremely robust, and certainly you don't want to change
> >> this.
> >
> > Show me just where it says "retry if you get a 5xx"
>
> It doesn't, and that's part of the problem.
>
> Some people use the 554 greeting to indicate "no mail under this
> domain", some to say "please try the next MX".
>
>


--
Jason Robertson
Now at the Nation Research Council.