Re: [exim] Email DNS Issue

On Sat, Mar 15, 2008 at 09:56:56AM +0000, Peter Bowyer wrote:
> On 14/03/2008, Vincent Stemen <vs1@???> wrote:
> > Actually, it does not just do a DNS check. Sender verify connects to
> > domain of the senders address and initiates the first step in sending
> > mail to make sure their server responds that the senders email address
> > exists. It then disconnects without actually delivering any mail.
>
> No, you're wrong. 'Sender verify' passes the sender address through
> the configured routers and verifies that it would be routeable - part
> of which will probably involve an MX lookup if the address would be
> routed remotely.
>
> Sender verify with the callout option does the dummy delivery attempt
> you're referring to. The two things are different, and the difference
> is important.

I forgot about it requiring the callout option to do the dummy delivery
attempt. Thank you for correcting me on that.