Sorry, I have had similar problems. Several ISP's don't alow customer mailservers to drop their outbound mail at the ISP smtp mail server.
If they don't allow outbound relay and don't setup your PTR record for your fixed IP, then you're screwed, and screwed more and more as correct DNS becomes required credentials to run a mailserver.
If you are running a mail server then you can deliver your mail yourself.
but the discussion began because AOL says they won't accept mail from "dial-up" networks and without PTR, no matter what you want to do.
This way, if the client mailserver becomes an open relay it will not mark the isp smtp server as a source of spam. Also virus mail explosions have helped instigating this policy. I don't say I agree with all that but.... it's a fact of live you have to deal with in this case.
Everybody's trying to protect themselves from mail abuse. ISPs are raising legit technical barriers (correct forward/reverse DNS and requiiring IPs not in DUL netblocks) to distinguish wannbe-legit "20 minute Imail admins" from "20-minute spammers" with an PC on a DSL/cable line and $100 of software for his spammer platform of a spam mailer and a cdrom of 50 million addresses.
As you point out some ISPs are even trying to protect themselves from their own business clients.
> Why would the typical business absolutely insist on NOT relaying its > outbound through the provider's SMTP gateway?
Because they are running a mail server, so why would a mailserver *not* be allowed to deliver the mail?
see above.
That's like saying every local Telco is not alowed to handle their own telephone calls but have to go through AT&T or something similar.
We are only talking about outbound, so a telemarketing telephone abuser who buys robot dialer and voice mail robot sofware is exactly like his abusive email counerpart with a spammer engine.
I'm runnijg a mail server because I need to use a mail server. A mailserver is used to deliver the mail, please let it do what it is intended for.
Relaying outbound through an ISP allows you to admin everything else about your mailserver, including receiving your inbound directly.
"in a ideal world", everybody has infinite freedom, has no responsibilities or duties, has saintly goodwill towards all, and email abuse doesn't exist.
Just because you consider yourself such an inhabitant of an ideal world, although your IP is badly located and your DNS sucks, doesn't mean everybody has to. If everybody doesn't want your mail, it's your problem, not theirs.
Len
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