The mailing list for listmasters using Sympa

["Malcolm Waltz" <address@concealed>]

Have you considered using remove_headers to strip out the offending
sender-ID info?

Assuming Sympa 6.x, that feature can be found in the web interface here:

"Admin" --> "Edit List Config" --> "Sending/receiving setup"  -->
"Incoming SMTP header fields to be removed"

-- or --

https://<hostname>/sympa/edit_list_request/<listname>/sending


-----Original Message-----
From: address@concealed [mailto:address@concealed] On
Behalf Of Russ Kepler
Sent: Monday, March 21, 2011 12:24 PM
To: address@concealed
Subject: [sympa-users] Sympa and "sender ID"

I know this isn't really a sympa error but I'm hoping that someone here
has 
resolved this before.

I've recently started getting bounce errors for a particular list user
in 
sending to Microsoft addresses also on the list.  Other users sending to

those addresses don't generate the errors.  The error in the syslog is
in the 
form:

Mar 15 15:25:37 main postfix/smtp[1871]: 925BE3F8D3:
address@concealed, relay=mx1.hotmail.com[65.55.92.152]:25,
delay=1.6, delays=0.33/0.01/0.73/0.5, dsn=2.0.0, status=sent (250 mail
from IP 216.184.14.31 soft failed sender ID check. Please ensure this IP
is authorized to send mail on behalf of [sky.com])

Apparently the header of the message is containing someone's sender ID
and 
Microsoft is thinking that I'm trying to pretend to be someone I'm not.


Poking around with google didn't come up with any clear solutions with
postfix 
configurations, or at least none I could hunt up quickly.  Maybe someone
has 
some pointers where to go?

(And yes, I've considered simply eliminating the Microsoft addresses
from the 
lists.  Still mulling that one over.)