[COLUG] sendmail Connection rejected: reverse DNS lookup failed

[Vince Herried]

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On Thursday 24 June 2004 09:37 pm, sundaram wrote:
> I am running sendmail for my E-mail server. We are not able to send mail
> to one of our customer, we are getting reverse DNS lookup failed error
> message. I checked reverse DNS lookup for my domain, output looks good.
>  
> SBC is hosting my customer mail server; they are saying it's my DNS
> server problem.
sound a lot like problems I had a while back with messges to aol and others.
It took me a bunch of hacking to get sendmail working again.
I made a bunch of changes to sendmail config parms and  I don't know which one 
did the trick, maybe all were required.

Your error messages sound a lot like mine also...
My server is insight.rr.com

domaintable (my machine is called desk.vince)
desk.vince		insight.rr.com


local-host-names:
desk.vince
localhost.localdomain

Mailertable:
aol.com	esmtp:smtp-server.insight.rr.com
insight.rr.com	esmtp:smtp-server.insight.rr.com

sendmail.mv:
LOCAL_DOMAIN(`desk.vince')dnl

MASQUERADE_AS(`insight.rr.com')dnl
FEATURE(masquerade_envelope)dnl
FEATURE(masquerade_entire_domain)dnl
MASQUERADE_DOMAIN(desk.vince)dnl


virtusertable: (vince is my userid on my desk)  I put all users in this table
# i think you need to restart sendmail for changes to take
vince   vherried at insight.rr.com


Then  do a make and restart sendmail (service sendmail restart).

With all that I can now do sendmail sends out the door and internal mail still 
works.

gud lock







- -- 
Vince Herried

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