cisco firewall/email

I recently had the problem of users at my company could not send email to people at ceeus.com. It turned out that our cisco firewall was not allowing it through (note: Cisco 1720 version 12.2). When I removed “ip inspect name FastEthernet_0 smtp” from the firewall it then let us send email to this company. We also have noticed that we cannot email employees at kiamichielectric.com. I am able to telnet to their mailserver and they are able to email us. My question is, (assuming the problem is on our end) is there a way on the router to grant specific access to connect to this company (in case I am missing something in the router/firewall config that is denying it)? Thanks for your help in advance.