On 5/21/2014 12:14 PM, Ian Eiloart wrote:
And, it’s not abusive if appropriate SPF checks are done first:
obviously, you don’t do the callout if you get an SPF fail. A callout
with an SPF pass isn’t abusive: if the domain sent me an email, then
it should be able to handle a callout.
You are wr
And, it’s not abusive if appropriate SPF checks are done first: obviously, you
don’t do the callout if you get an SPF fail. A callout with an SPF pass isn’t
abusive: if the domain sent me an email, then it should be able to handle a
callout.
Let me just say that a lot of people at large ISPs
On 17 May 2014, at 04:08, John Levine wrote:
> Everyone I know who's tried to do spam filtering by SMTP callbacks to
> verify sender addresses has stopped,
Not me.
> for the dual reasons that it
> doesn't work, and it's abusive.
It is helpful, we get almost no complaints. Complaints are usual
