Yesterday evening we upgraded our BGP routers to Cisco 7301 with IOS c7301-advipservicesk9-mz.124-9.T. We enabled the IPS signatures to log only, however we had an issue with incoming web mail from Yahoo and Hotmail, all other e-mail was fine including other web mail such as googlemail. After checking the signatures we could not see any that may cause an issue and especially as all signatures are set to alert and not block, however as soon as we disabled the IPS all the web mail was delivered. I was wondering if anyone may have come across this issue or anything similar before.
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