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SMTP traffic does not pass through the IPSec VPN tunnel when a 2811 router with Cisco IOS Software version 12.4 is used as the tunnel end point

Core issue

This problem occurs when the ip inspect name esmtp command is issued.

Resolution

For a workaround, disable the ip inspect name command for the traffic that needs to pass through the VPN tunnel, as shown in this example:

(config)#no ip inspect name esmtp

For more information, refer to SMTP and ESMTP Connections Inspection with Cisco IOS Firewall Configuration example for more information.

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