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Mailguard and UC540

I have an email server behind a UC540. I have turned on firewall set to MIN.

Once I did that i started to have an issue with my mail flow with error firewall #500

after doing some research I see that is a common probem with Cisco PIX firewalls.

Can anyone tell me how to disable this on the UC 540?

see links for docs i found below:

http://support.microsoft.com/kb/320027

https://support.appriver.com/KB/a238/cisco-pixasa-mailguard.aspx

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Beginner

I'm having this same problem too, tried using the 'no ip inspect name SDM_LOW esmtp' command but I am still get the same error.

Looking forward to hearing from someone!