how to resolve sender domain

[apichart]

May 19 19:17:48 smsc3 sendmail[6441]: TAA06441: to=6615851123@dtac.co.th, delay=00:00:00, mailer=local, stat=Transient parse error -- message queued for future delivery
Hi, Ho


if originator is "6615851123@dtac.co.th", how to resolve the sender domain


May 19 19:17:48 smsc3 sendmail[6441]: TAA06441: ruleset=check_mail, arg1=6615851123@dtac.co.th, relay=localhost [127.0.0.1], reject=451 Sender domain must resolve
May 19 19:17:48 smsc3 sendmail[6441]: TAA06441: from=6615851123@dtac.co.th, size=0, class=0, pri=0, nrcpts=0, proto=SMTP, relay=localhost [127.0.0.1]

[Geoff Wild]

You can't resolve a non existant domain:

dtac.co.th does not exist - part of the anti-spamming rules of sendmail...

Rgds...Geoff

[apichart]

there is no way to define it?

[Geoff Wild]

Define it?

You would have to register that domain and host it yourself....I don't think you want to do that....

Basically, what I think happened - someone tried to spam an id that probably didn't exist on your system, and your server tried to send a nice message back to them - using the return "fake: address they provided: 6615851123@dtac.co.th

Next step for you - do nothing, or block the server that originally relayed that message....

Rgds...Geoff

[apichart]

I'm testing my application. I'm the one who created 6615851123@dtac.co.th. but it seems that i'm gettting the problem with sendmail application. That's why I'm asking you to resolve it.

I'm not a expert in unix..

[Geoff Wild]

Oh - okay...

Like I said above, dtac.co.th does not exist - so you can't send email to that domain.

So, test your application by sending to a valid domain - like your own - or send to yourid@localhost


Rgds...Geoff

[apichart]

actually, I did try to send mail as sc user to a particular alias defined in /usr/lib/aliases
eg. mail aliases_name.

For this case, it's not possible to define this particlar domain, is it?

I sent the mobile short message to the server and my application would convert it in the STMP with originator 6615851123@dtac.co.th... could it be possible to accept this sender domain?

[Geoff Wild]

Possibly add dtac.co.th to /etc/mail/access file as relay:

dtac.co.th relay

makemap hash /etc/mail/access
stop/start sendmail

/sbin/init.d/sendmail stop
/sbin/init.d/sendmail start

Rgds...Geoff

[apichart]

What do you mean?

makemap hash /etc/mail/access

I'm not good in unix. sorry abou this.

[Geoff Wild]

Sendmail uses what's called "hash databases"

makemap creates the database maps used by the keyed map lookups in sendmail(1M). It reads input from the standard input and outputs them to the indicated mapname.

Being new to Unix - a good thing to remember, is most commands have manual pages.

Just execute:

man makemap

That will tell you what it does.

Another thing to do, is bookmark the following:

http://docs.hp.com

For more on sendmail:

http://www.sendmail.org

Unix is great and the learning never ends - after 10 years I'm still learning. :)

Rgds...Geoff

[Geoff Wild]

I see you are fairly new to the forums as well - please read the following:

http://forums1.itrc.hp.com/service/forums/helptips.do?#28

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=140137

as i notice you havn't assigned points to any of your questions:

http://forums1.itrc.hp.com/service/forums/publicProfile.do?userId=CA1112392&forumId=1

have assigned points to 0 of 28 responses to my questions.

Thanks...Geoff