Auteur: John W. Baxter Datum: Aan: exim-users Onderwerp: Re: [exim] Problems sending to a server with call-out verification
On 5/26/06 4:36 AM, "Toralf Lund" <toralf@???> wrote:
> I've recently been having problems sending from the Exim setup at work
> to a server that uses call-out verification. The receiver, probably also
> running Exim says
>
> SMTP error from remote mailer after RCPT TO:<somewhere@???>:
> host somewhere.net [1.2.3.4]: 451 Could not complete sender verify callout
>
> [receiver address and IP have been altered.]
>
> I suspect that this may actually be caused by some kind of problem at
> our end, as other people seem to be able to send to this particular
> address. We can send to other servers as well, but maybe most of them
> don't use callout verification?
>
> In any case, do you have any idea what may be causing this?
Do your logs (on your incoming server(s)) show anything interesting at about
the time of the send?
Could you be refusing their callback connection for spam control reasons?
Note: somewhere.net exists (with whois showing a 1998 creation).
"example.com" is safe for this sort of thing...most domains one might make
up are not.
