The story is that one of my users is overseas. She somehow sent
messages from a foreign host to other users. Since the sender host was
not local/internal AND the from was legit, I wanted to reject the message.
Is it possible for IMail to have different settings per network port?
I'm not familiar with "IP'd hosts" and virtual hosts. I have only one
domain.
Maybe I should ask a more general question.
How do I set up IMail when it communicates with internal and external
hosts via one network port?
Right now the server is behind a firewall with a one-to-one NAT assignment.
adamc
Len Conrad wrote:
How can I prevent my server running IMail 8.22 from accepting messages
from external hosts where the from has my domain, robinsonmfg.com?
It should receive messages from robinsonmfg.com from only one host and
that host is internal.
There are two kinds of envelope sender forgery here
1. forgery of [EMAIL PROTECTED]
this is always rejectable reliably. the SMTP service needs to check the
my.domain's list of users before accepting.
2. forgery of [EMAIL PROTECTED]
.... is a little risky since you might have roaming users that send
through Imail using their Imail account. But with no roamers, then the
policy would be "if not my_networks AND from: my.domains, then reject.
I don't think either of theses policies are possible on Imail, but they
are on IMGate.
Perhaps IMails SAV could be rigged at least to reject
[EMAIL PROTECTED]
Len
_____________________________________________________________________
http://IMGate.MEIway.com : free anti-spam gateway, runs on 1000's of sites
To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html
List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
