ESA: outbound messages

[Sergey Tregubov]

Hello,

We've deployed ESA in out customer network.

All incomming connection comes to ESA, ESA queries LDAP (Route Query) and reroutes messages to specific servers (mailhost attribute).

In our SMTP Routes no entries.

Incomming messages works fine.

But outgoing not. Problem is that we need t send all outgoing messages to specific relay. We cannot use DNS.

So when i add smtp route (All Other Domains) i got situation when all incomming messages goes to the server specified in SMTP Route. However in message tracking i see that ESA got mailhost attribute from LDAP.

Who can explain, please?      

[Luis Silva Benavides]

Hi Sergey,

I think the two key points are highlighted/underlined below. I took this information from the Advance Guide.

https://www.cisco.com/en/US/docs/security/esa/esa7.6/ESA_7.6_AdvancedGuide.pdf

"

SMTP Routes Overview

The SMTP Routes table is read from the top down for every email delivery.

Otherwise, the system performs a regular MX lookup on the domain of the Envelope Recipient.

Default SMTP Route

You can also define a default SMTP route with the special keyword ALL. If a domain does not match a previous mapping in the SMTP Routes list, it defaults to being redirected to the MX host specified by the ALL entry

"

HTH,

Luis Silva

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