Your problem is lack of transparency in the firewall. It adds its own address to
sendmail making all mail appear to be internal. The Lotus Notes server probably has a
rule to block email that is both coming and going to a non local IP address, which is
the normal rule for blocking spam relay. But in your case, the firewall in between
makes it look as if the email is coming from the firewall rather than the original
sender. You can do two things to prevent this.
1/ Set up the Notes server to reject any email that does not get converted from SMTP
format to Notes format. This has problems if you allow internal desktops to use SMTP
format mail to get to your Notes server but is the best.
2/ Configure the Borderware to run a full SMTP proxy that is at least at level of
Sendmail 8.9.3. Then the firewall will reject relaying.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Warren van Eyssen
Sent: Thursday, May 24, 2001 11:46
To: Firewalls (E-mail) (E-mail)
Subject: Mail relay
Hi all,
Does anybody know how to prevent external mail relay to a Lotus Notes server
which sits behind a Novell bordermanger firewall?
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