Re: [exim] Sender verification failing sometimes

On 6/14/2011 3:21 AM, Ian Eiloart wrote:
> On 14 Jun 2011, at 05:24, Phil Pennock wrote:
>
>> On 2011-06-13 at 00:32 +0000, Michael Jimenez wrote:
>>> So I've been looking at my mail server mainlog for the past couple of days watching mail come in and out, I've noticed that this Microsoft address keeps failing to verify:
>> You're using sender *callout* verification to systems not under your
>> administrative control. This is regarded by many as abusive, and will
>> get you placed on various blacklists.
> Is that true? I've not experienced it, in several years.

It's one of those things that could be true depending on how you have
things configured. I use sender verification callouts myself without any
problems. but I use them after a lot of other tests to reduce the number
of callouts I have to do.

The real answer is - use it lightly.

I do the black lists first, verify the recipient is good, and then after
some other test do sender verification. I've never run into a problem
with it when used that way. But if I did it on every message then I'd
likely have a problem.