[Mailman-Users] Confusion between sendmail and mailman for hostnames

Chris Waltham cwaltham at bowdoin.edu
Wed Sep 19 17:27:04 CEST 2007

I must confess that it has been, well, years since I've used  
sendmail, and I guess things have changed in the meantime. Apparently  
there's this new sendmail.mc file? :-) Seriously though, I'm having  
difficulty getting sendmail (8.13.1) and Mailman (2.1.9) to play nice  
under RHEL 4.

I have a new server called bingham.testing.bowdoin.edu, which has a  
CNAME in DNS so that newlists.bowdoin.edu points to  
bingham.testing.bowdoin.edu. Because bingham will do other things  
than just Mailman, I wanted this flexibility. I compiled Mailman  
with  --with-mailhost=newlists.bowdoin.edu and --with- 
urlhost=newlists.bowdoin.edu so that I can make as few changes to  
mm_cfg.py as necessary.

So, I'll create a list called "testing" on the machine that is  
bingham.testing.bowdoin.edu (but Mailman believes it's  
newlists.bowdoin.edu). I can email testing at newlists.bowdoin.edu and  
subscribe myself to the list and post to the list successfully.  
However, when I click "Reply" to a message posted to the testing  
list, the email address displayed is  
testing at bingham.testing.bowdoin.edu instead of  
testing at newlists.bowdoin.edu.

I presume that this is a sendmail problem. I've added  
"newlists.bowdoin.edu" to /etc/mail/local-host-names but that didn't  
fix the issue. I've also tried setting "MASQUERADE_AS 
(`newlists.bowdoin.edu')dnl" but that didn't have the result I  
wanted, either. Could someone please help me out? Let me know if you  
need more information from my sendmail.mc and I'll gladly provide it.



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