Re: [Asrg] What are the IPs that sends mail for a domain?

Ian Eiloart <iane@sussex.ac.uk> Mon, 22 June 2009 10:40 UTC

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Subject: Re: [Asrg] What are the IPs that sends mail for a domain?
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--On 19 June 2009 11:30:13 -0700 Douglas Otis <dotis@mail-abuse.org> wrote:

> MTP is heavily abused, and soon IPv6 is about to become a necessity.   To
> remain practical, connectivity must be based upon _immediate_ and
> _stable_ evidence of legitimate email operation, and not upon any number
> of authorization transactions.  Each additional transaction to support an
> authorization scheme will be multiplied by the typical number of attempts
> made by abusive senders.

Except that results can be cached.

>  This means providers need to exclude
> problematic users, and not become a task pushed toward recipients.  Such
> pushing is not practical and often leads to unfortunate mistakes.



-- 
Ian Eiloart
IT Services, University of Sussex
01273-873148 x3148
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