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When you specify MAILRTR(*NONE) your email is going like this:

Your IBM i -----> recipient's mail server.

For years now, most people use a mail host.. in house exchange server,
Office 365, GMail, etc.. that means your email goes:

Your IBM i ---> Gmail Server ----> recipient

In the prior situation it may "work" for some recipients, but more and more
are requiring a reverse DNS lookup... that fails and your email fails and
you probably didn't even know it.

The latter situation requires SSL/TLS and authentication. Lately a lot of
hosts are announcing the end of user/password AUTH and going to "more
secure" things like OAuth 2.0. IBM i won't do that, and

our MAILTOOL software has had this ability, as well as the basic Auth, for
many years and less than a coffee a day.

Here's an article with most of the methods available:

Sorry, ahead of time, Rob. I still love you, man. :)

On Fri, Oct 14, 2022 at 3:40 PM James H. H. Lampert via MIDRANGE-L <
midrange-l@xxxxxxxxxxxxxxxxxx> wrote:

We currently have applications on our V6 box (most notably, the back-end
of our self-service license authorization code webapp) that send email
using QtmmSendMail. Our V6 box is set up with MAILROUTER(*NONE), and I'm
pretty sure I did something with DMARC setup, over a year ago (and I
don't remember what I did, or how).

And we're moving an application with email capability over to a cloud
V7R5 box (the same one that's been giving me problems with TLS for
iNav), on which SMTP is not set up *at all.*

Our email provider is GMail. For years, List members have been telling
me that MAILROUTER(*NONE) is a bad idea, but there wasn't much I could
do about it from a V6 box.

What do I need to do, and where can I learn how to do it?

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