Hi there,

Sorry to be so long replying - I've been busy with work & haven't been reading the list. In case you're still having problems - and for the benefit of teh Googles - it looks to me like mail.ipr.edu may be doing clever greylisting & stuff.

If I telnet in and - giving a legitimate from: address - try sending a message to jason@ipr.edu then it tells me to try again later. If I try sending one to root@abulafia.ipr.edu I get user unknown (in fact, I think there is no MX record for abulafia.ipr.edu).

I don't know for sure whether things have changed at mail.ipr.edu in the last week, but maybe it's rejecting the mail because the from: address is invalid. I would try changing the from: address set by Joomba.

Stroller.

On 11 Apr 2008, at 20:31, Jason Messerschmitt wrote:

Thanks for your response. Here is the output of my telnet test. I guess I'm really not sure what to make of it. The bolded text is of some concern to me.

pc130:~ admin$ telnet mail.ipr.edu 25
Trying 66.226.64.2...
Connected to mail.ipr.edu.
Escape character is '^]'.
220 pro.abac.com ESMTP Sendmail 8.14.1/8.14.1; Fri, 11 Apr 2008 12:27:30 -0700 (PDT)
helo abulafia.ipr.edu
250 pro.abac.com Hello 75-146-145-253-stlouispark.mn.minn.hfc.comcastbusiness.net [75.146.145.253] (may be forged), pleased to meet you
mail from:root@abulafia.ipr.edu
250 2.1.0 root@abulafia.ipr.edu... Sender ok
rcpt to:jason@ipr.edu
550 5.1.1 jason@ipr.edu... User unknown

Thanks again. I'm not necessarily looking for someone to give me the answer, as it were, but if I could get some help looking in the right direction I would be very appreciative.

Best to you,
Jason

On Fri, Apr 11, 2008 at 12:50 AM, Stroller <stroller@stellar.eclipse.co.uk> wrote:
It's kinda difficult to help with this, without knowing what the A-Plus server is seeing.
An unsanitised copy of the bounce message would probably show the problem.

Does it definitely show the correct email address of a user for which A-Plus has a mailbox?

Can you reproduce the problem telnetting to the A-Plus MX server on port 25?
http://www.yuki-onna.co.uk/email/smtp.html
http://www.simplescripts.de/smtp-check-port-25-telnet-command.htm

Stroller


On 10 Apr 2008, at 19:44, Jason Messerschmitt wrote:

I guess I'll dip my toes in here and admit that I can't figure this out.

Synopsis:  I've setup Postfix to be a mail out only smtp server. I just want it for our Joomla based web pages and our helpdesk to be able to mail to users from the local server. The problem is this: I can mail to any domain (gmail, hotmail, yahoo, etc) without problem, but I can't receive mail directly through our A-plus based mail (the worst!). What happens is that A-plus' server rejects the user as unkown even though I know it is correct. What really gets my goat is that after that message is returned to my server it is then delivered to the A-plus server and thusly shows up in my webmail and email client. Below are my configs.

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