ChristianR

iTrader: (1)

Hi,

I am using ISA -> ISA MSG SCREENER -> Exchange 2000

We are experiencing problems when people are trying to send us email using ESMTP. If they change to use normal SMTP the email arrives, just not on Extended SMTP. We can email them.

Any solutions? anyone know why this is happening?

Regards,

Christian

Jeff Wiltshire

I'm guessing that ISA server doesn't understand the extended commands under ESMTP....

ChristianR

iTrader: (1)

what I thought - i believe it might be down to the isa message screener (filter software).

Just wondering anyway to fix it? or if anyone has heard it?

Molds

Don't know the answer Christian but for ISA and Exchange I use these resources: -

ISAServer.org
ISA by Bill

MSExchange.org
Exchange by Bill

Good luck!

Cheers

Matt

mark_h

Either the client or server is broken.

The client will say EHLO, to which the server will respond with a success (it understands and supports ESMTP) or failure code (unknown command). If the client sees the failure code, it should fall back to SMTP and say HELO.

So either the client isn't falling back to SMTP, or the server isn't responding correctly - I've seen some servers that just close the connection if they receive an unknown command.

ChristianR

iTrader: (1)

the server can accept either - it then passes it through to the message isa filter software which I presume doesn't support it.

anyway just to completely disable emstp?

ChristianR

iTrader: (1)

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