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Cisco 871 SMTP Inspection

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  • Cisco 871 SMTP Inspection

    Hi,

    recently, I configured a Cisco 871 and everything seems to work fine. However, today I noticed that I'm not able to relay e-mails (using unencrypted SMTP) or to use SMTP with TLS at all. This problem seems to be well-known and is described here:

    http://www.mnet.state.mn.us/mail/setup/tls.php
    http://forums.petri.com/showthread.php?t=23340

    I used SDM to configure my firewall. One of the static NAT entries (outside -> inside) is for SMTP. 'Application Inspection' for SMTP is not used for that rule. I assume that the SMTP application inspection only counts for outside -> inside, or isn't that true? Does anyone know how I can disable the SMTP inspection using SDM?

    Any help is appreciated!

    rjh
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