sender+ip restrictions - ReadList.com

2 msg	MASQUERADING FROM BUT NOT TO
3 msg	Probably not a Postfix problem...?
3 msg	Quick question with user/virtual aliases.
4 msg	Sending healty batch emails
5 msg	use of relayhost, relaydomain?
6 msg	naming the mail server
1 msg	Re: statistics by client ip address - SOLVED
3 msg	question marks on permissions/owner
2 msg	Configuring Postfix to Receive Mail from Outloo...
3 msg	tcp_table and propose for new lookup table 'pip...
12 msg	About date spoofing
3 msg	Overriding DNS lookups for a specific domain
2 msg	redirecting a single email address/alias (not a...
1 msg	statistics by client ip address

sender+ip restrictions
\ Dan Lannom (13 Mar 2008)
. \ mouss (13 Mar 2008)

14 msg	postfix-2.5 RPMs available
1 msg	Setting up Postfix on Solaris 10
8 msg	Yet another virtual domain problem - do not lis...
2 msg	getting a user permissions error
2 msg	551 mail refused

Subject:	sender+ip restrictions
Group:	Postfix-users
From:	Dan Lannom
Date:	13 Mar 2008

We want to accept email with a specific envelope sender from only a
specific ip range and then deliver it, bypassing our spam filters.

I've not been able to locate a good solution for this on our mx servers.
SPF is not a good choice, for example, since the group sending can't
seem to handle it[or even setup mx records that match their sending
domain]. I also don't want to just trust that the sending domain would
not be spoofed.

The current plan is to have them relay through a separate machine as a
trusted relay using a custom mail domain that remaps the recipient into
our normal mail domain using canonical.

Is there a better way? Can we accept email from @some.domain.com only
for 1.2.3.0/24 using normal postfix configurations? [ie. no custom
policy server]

Thanks,

Dan Lannom
UofM-Dearborn