i use this class-map in our policies:
class-map type inspect match-any cls-salida-internet
match protocol dns
match protocol http
match protocol https
match protocol pop3
match protocol pop3s
match protocol ntp
match protocol pcanywheredata
match protocol pcanywherestat
match protocol msnmsgr
match protocol user-hauri1
match protocol user-hauri2
match protocol ftp
match protocol tcp
match protocol smtp
the thing is, the SMTP client (in this case MS Outlook) only works if i add "match protocol tcp" command
in other router there is "smtpe" protocol available but i cant find it in this IOS image
regards
Juan Manuel Garcia