Configuring Sendmail?: more information

[Mitch Wiedemann]

Mitch Wiedemann wrote:

> Can anyone tell me how to configure sendmail so that the messages 
> don't appear to be coming from root at localhost.localdomain?
>
> I have two FC2 file servers (one primary, and one backup)  at a client 
> site which I occasionally want to send e-mail messages to me (from 
> LogWatch, cron, etc.) so that I can keep tabs on their status. But the 
> messages seem to be getting bounced by their ISP because of the mail 
> headers.  And I do get messages complaining about a possible open 
> relay, which isn't the case, because I've got a firewall running and 
> the attached messages are always the "system" messages I'm expecting.
>
> I get messages like this:
>
> The original message was received at Wed, 18 Aug 2004 05:43:15 -0400
> from localhost
> with id i7I9hE33029531
>
>   ----- The following addresses had permanent fatal errors -----
> mc2 at lightlink.com
>    (reason: 590 <>... NJABL Open Proxy ** [aaa.bb.ccc.dd] ** See 
> http://dnsbl.njabl.org)
>    (expanded from: <root at localhost.localdomain>)
>
>   ----- Transcript of session follows -----
> 451 4.4.1 reply: read error from mail0.lightlink.com.
> ... while talking to mail1.lightlink.com.:
>
>>>>>>> MAIL From:<> SIZE=4302
>>>>>>
>>>>     
>>>
> <<< 590 <>... NJABL Open Proxy ** 129.44.215.166 ** See 
> http://dnsbl.njabl.org
> 554 5.0.0 Service unavailable
>
> [snip]
>
>
> And to make it a bit more confusing, I do occasionally receive the 
> messages from cron, but not logwatch.
>
> Is there a way for outgoing mail to be sent from an address more 
> acceptable to the ISP?  The client "master" e-mail address for instance?
>
> Any assistance will be most appreciated.
>

I read the See http://dnsbl.njabl.org site, and found that the ISP is 
bouncing some (but not all !??) messages because:

*aaa.bb.ccc.dd* is listed as a dial-up port / dynamic IP in dnsbl.njabl.org

Why would some messages be delivered, and not others?  The client does 
have DSL service, and does get a dynamically assigned IP address, but I 
have DSL at home too, and my home workstation sends it's system emails 
without any trouble.

Again, any assistance will be most appreciated.



-- 
Mitch Wiedemann
mc^2 Computer Consulting
mc2 at lightlink.com
http://www.lightlink.com/mc2