Great Circle Associates Firewalls
(August 1997)
 

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Subject: RE: Firewall-1 & ESMTP connectivity
From: "Edkins, Rob - Axon AKL" <edkinsr @ axon . co . nz>
Date: Mon, 11 Aug 1997 15:09:46 +1200
To: "'Basil McCrea'" <mccrebsi @ ina . de>, "'Teo Yoke Foong'" <yfteo @ singnet . com . sg>
Cc: "'firewalls @ greatcircle . com'" <firewalls @ GreatCircle . COM>

The V3.0b upgrade is supposed to solve this problem.
Apparently it is due very soon.

We have experienced the same problem with MS Exchange Servers, which
also use emsmtp

>-----Original Message-----
>From:	Basil McCrea [SMTP:mccrebsi @
 ina .
 de]
>Sent:	Monday, July 21, 1997 6:48 PM
>To:	'Teo Yoke Foong'
>Cc:	'firewalls @
 greatcircle .
 com'
>Subject:	AW: Firewall-1 & ESMTP connectivity
>
>Hi,
>
>We had the same problem. We got around it by upgrading to sendmail v8.8.6. It
>doesn't
>bring the "220 ESMTP spoken here" reply, instead it replies
>
>220 hpxxxx ESMTP (8.8.6/xxxxxx).
>
>Eventhough upgrading was alot of effort just to get rid of 1 line.
>
>Basil
>
>----------
>Von: 	Teo Yoke Foong
>Gesendet: 	Montag, 21. Juli 1997 04:09
>An: 	'Firewalls @
 GreatCircle .
 COM'
>Betreff: 	Firewall-1 & ESMTP connectivity
>
>Has anyone encountered this problem before ? 
>
>We are using firewall-1 to store and forward Email between the internet
>and our production Email server. Firewall-1 is used to download Email
>from the internet via SMTP, and then uses SMTP to forward the EMail to
>our server (I believe using Firewall-1 for SMTP proxy is standard
>practise). Firewall-1 fails to communicate with our internet providers
>SMTP server, the log file has the following error "Agent Dequeuer error
>220 sendmail".
>
>We suspect that Firewall-1 has an incomplete parser. The
>SMTP hosts return two lines when you connect to telnet port 25. e.g.
>220-hxx0, HP sendmail  ready at ...
>220 ESMTP spoken here 
>it is valid with SMTP to use 220-, with the hyphen meaning more info
>lines will follow, the 220<space> denotes this is the last 220 type
>line.
>
>It looks like Firewall-1 reads the "220-hxx0..." line, and then issues
>its SMTP HELO, it then reads the next line expecting "250 hxx0 Hello
>...", but gets the "220 ESMTP spoken here" line (since it is still in
>the buffer). This appears to confuse Firewall-1, which fails to
>continue.
>
>Appreciate any explanation and workaround.
>
>Btw, is firewall-1 is using smap and smapd ? 
>
>Thanks in advance.
>

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