Mithun Bhattacharya rearranged electrons thusly:
> Suresh I am not exactly sure which part of the website actually had
> solution to the issue faced by me.
Here's where ...
> My scenario was that I was permanently online using anyone one of a set
> of ISP's. My mail server was sending out emails directly and not running
> as a smart relay. What I used to notice is that during peak loads my
> mail server was timing out on mail deliveries to Hotmail and Yahoo. To
> solve the problem I had configured my mail server to act as a smart
> relay for all recepients in hotmail.com and yahoo.com domain. This setup
> worked pretty well for me when I was dialing out to VSNL.
DNS is one of the major delays in mail delivery - and if you use a smarthost,
the smarthost server has to anyway repeat the DNS lookups before it can do
delivery. Plus, it is permanently connected with a much fatter pipe than you
can manage with a dialup.
You'll agree that there's no point leaving mail in an outgoing mail queue for
longer than necessary - so pushing it out through a smarthost fast - and not
wasting bandwidth doing DNS lookups (and perhaps not using a smarthost and
connecting directly to the remote machine's MX) is what's needed.
> As for rediff.com my ISP didnt give me a FQDN (most ISP's do give you a
> FQDN even though it might not be something you like - maybe like
> dailup001.del2.vsnl.net.in or something simillar) - I might be wrong but
You mean rDNS (PTR records) right?
> I believe the server was closing connection saying something simillar.
Rediff being the same people who were (for a while) randomly issuing
"relaying denied" for local deliveries (our server connects to one of
rediffmail's MXs, to deliver mail to a rediffmail user - and it used to spit
back a "relaying denied") I'm not at all sure they are blocking on bad /
missing rDNS.... besides which it'd block a lot of legit mail from India.
[too many ISPs dont realize the need for this]
Anyway, rediffmail's MXs themselves dont have any rDNS configured from what I
can see ...
> Anybody who doesnt get a ip name when doing a lookup for their ip
> address might want to try sending a email to rediff.com and post to
> comment on that.
To rediff.com (their corporate servers) or to rediffmail.com?
-suresh
--
Suresh Ramasubramanian <--> mallet <at> efn <dot> org
EMail Sturmbannfuhrer, Lower Middle Class Unix Sysadmin
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