Re: SPF records and DKIM signatures on ubuntu/postfix/mailman

On Fri 14 Oct 2011 20:27:09 NZDT +1300, Mark Foster wrote:

> As far as the world is concerned the IP you're on does _not_ have a
> valid forward/reverse pair, based on the headers of the last message you
> sent to the list anyway.

Yes, so I figured. TCL is going steadily downhill. Beats me how they
manage to be ISP of the year all the time.

> The fact it works inside of TCL only is actually broken, and I'd suggest
> that you raise it with TCL.

Do they still care? I'd put more effort in if it had a tangible benefit
for me, but sending email directly without relaying through the ISP
stopped working years ago.

> Checking your DNS works outside of the authoritive/hosting server is
> something that you should always do anyway, if the means presents.  Many
> ISPs are now blocking external lookups for security reasons, 

For servers that send mail - certainly, for domestic cable Internet use
it's not so critical. What do you mean by "blocking external lookups"?
External DNS lookups? Blocked, or redirected to their own DNS resolver?
I have no indication that that is the case with TCL. Web cache yes to
varying levels of transparency, but DNS?

Volker

-- 
Volker Kuhlmann			is list0570 with the domain in header.
http://volker.dnsalias.net/	Please do not CC list postings to me.

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