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SMTP filter issue with multiple external IP address and MX records

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SMTP filter issue with multiple external IP address and... - 1.Feb.2005 11:17:00 AM

urbi

Posts: 19
Joined: 30.Sep.2001
From: Hungary
Status: offline

Hello,
I configured multiple IPs on ISA 2004 external interface, and our ISP configured our DNS record with multiple names and MX records which is pointing to same IP address I have pain with SMTP filter service. When I try to test the connectivity with telnet, ISA 2004 server did not respond on a specific name. SMPT publishing narrowed to only one ip (not all external/public IPs)

DNS records looks like this:
A=company.com / IP=1.2.3.4/MX=10
A=mail.compnay.com /IP=1.2.3.4 /MX=20

ISa have these IPs on external NIC: 1.2.3.4, and 1.2.3.5

SMTP server published ONLY on 1.2.3.4

If SMTP filter enabled:
Telnetting to company.com (MX=10)have no effect (ISa not seponding)
Telnetting to mail.company.com (MX=20)works fine

Without SMTP filter I have no issue.

Any idea? It is a bug?