RE: eMail authentication

Mail Routers are often used in this case... probablhy 99% of the time. The
biggest reason becoming more popular is doing RDNS (Reverse DNS Lookups).

So, if you don't have your i5 set up to deliver mail to a mail router, that
could be the issue too as you'd set up SMTP/MSF to deliver to the mail
router, then the mail router would actually deliver the mail, and should be
able to do authentication on it's own.

Bradley V. Stone
BVSTools - www.bvstools.com
eRPG SDK - www.erpgsdk.com

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Scott Klement
Sent: Friday, November 16, 2007 3:20 PM
To: Midrange Systems Technical Discussion
Subject: Re: eMail authentication


MTA is "Mail Transfer Agent"... In other words, an SMTP server that
queues mail and transfers it to a recipient's mail server.

From your original message, it sounded like you're using SNDDST and
QtmmSendMail() to send e-mail. Folks who are familiar with these tools
know that they use the LOCAL SMTP server (The one that comes with i5/OS)
as their MTA.

So for authentication to your ISP to make any difference whatsoever, you
must've told your i5/OS SMTP server to forward all e-mails to your ISP's
MTA. Otherwise, it'd never go to the ISP's server, and therefore
whether they used or didn't use authentication would be completely
irrelevant. That's why Walden asked "why not send directly to the
remote MTA" which means, why not send directly to the e-mail recipient's
server instead of sending it to your ISP's server.

The most common reason why you'd want to send to your ISP, instead of
delivering directly (as Walden also pointed out) is when you buy an
Internet connection that wasn't intended to host a business, but rather
was intended to host an end consumer (such as a residential connection).
In that scenario, the ISPs often block e-mail unless it goes through
their servers because they want to stop spam.



Allen wrote:

I can't say why, it's just the way the program were written
to relay the email from the System i (i5, iSeries, AS/400)
to the email server which then sends the email out.

I am not familiar with MTA??

Allen

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