Hi Tac,
>I have a huge (200K) mailing to get out, and I know that about 10% of the
>addresses are bad.
That is about the average bad count we see here.
>What's the absolute best way to catch these bad
>addresses and delete them from the list? Some of them are invalid domains,
>others are valid domains but the user doesn't exist at that domain. Is
>there a way to purge the list of the invalid domains before I even start the
>mailing?
We run two templates over the database before we even get close to sending
anything. Firstly use the custom tags of your choice from the Allaire Dev
Centre to check the correctness of the eddress itself. It is amazing how
many people put a "." at the end of an eddress and other similar things.
Then we sort and select the domain names from all the eddresses and check
them with an NSLookup tag. Those that fail we mark in the database to get
sent last as they could well be bad. We apply a bit of AI to our test at
this time to mark some as known bad before we start.
What you have left is a reasonably clean database that you can send but do
as Howie suggested, set a return eddress as many will come back from good
domains as "unknown" and make some efficient "bad send" handlers.
Hope that helps,
--
Yours,
Kym
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