Author: W B Hacker Date: To: exim users Subject: Re: [exim] run an MTA reliably without a static IP and reverse DNS
Sub Zero wrote:
>>>However, in practice, you will find it very hard to run an MTA
>>>reliably without a static IP and reverse DNS.
>>>
>>>In fact it is even easier than it is thought.. :)
>>
>>How would you do it, to the full extend? Use dyndns?
>
>
> Exactly...
>
-- purchasing advice snipped .. Wrong list..
>
> Receiving mail is not and has never been a problem...
Few MTA's bother to 'vet' a destination. A destination either
resolves and hand-shakes correctly at the moment of a delivery
attempt or not.
> I use yi.org and it
> just does it's job pretty well.. :) Adding an MX to self A will do.. :)
>
>
You may have missed the point. It is your *outbound* traffic
that is at risk of rejection unless you use a 'proper' MTA /
smarthost.
An increasing number of MTA *DO* try to vet the source of
incoming traffic, and that may include not only forward/reverse
lookups, but also checking (R)BL's for the organizations that
purport to offer workarounds.
Ergo 'yi.org' may not be as useful as you think it is.
Not to forget - this Exim mailing list is considerable more
'forgiving' as to what it accepts than many other MTA are - Exim
or otherwise.
It isn't about branding *everyone* who has 'no fixed address' as
undesireables.
It is about reminding those among them who give-a-damn, that
they are operating in a manner that puts them on the 'deny' side
of a test that is highly effective as to blocking zombies.
If it waddles like a duck, looks like a duck, quacks like a
duck... we call it a duck.
