RV042 Hardware V 1.2 Firewall is blocking some incoming mail

Firmware Version: 1.3.12.19-tm
I'm having an issue where our RV042 router is blocking some of our customers from sending us
e-mails.I noticed thatCISCO has produced a newer version of the RVO42 V3.0 and has firmware version 4.x. Probably a stupid question but canyou upgrade the Linksys RV042 Hardware V 1.2 to the 4.x firmware? I have found a few articles and forums online about otherpeople having the same issue with the RV042 v1 randomly blocking
e-mail but no one ever has a solution to correct the issue.Some people have recommend to roll back to factory default and reconfigure
the router as the config may by corrupt. I'm notopposed to doing this but I'm just curios if this has ever worked for anyone?
Thanks,
Lo

Jasbryan,
Thanks for the reply, as far as I can tell the Protect Link services are disabled. When clicking on the Protect Link tab I am prompted with three options
1. I want to buy Trend Micro ProtectLink Gateway
2. I have purchased ProtectLink Gateway and want to register it
3. I have my Activation Code (AC) and want to activate ProtectLink Gateway
Please let me know if i'm looking in the wrong location. The reason why I think the firewall is to blame is I can find entries in the log file below. My company has two ISP, one Cable one DSL. The cable is connected to Wan1 and the DSL is connected to Wan 2. THE RV042 is the first device on our network.
Does the ixp0 refer to the lan connection? ixp1 to wan1? ixp2 to wan2? One of our clients that can't e-mail us allowed me to setup a test e-mail account with outlook express with one of their e-mails. I can e-mail my personal yahoo account but I cannot e-mail my work email.
This is the Policy violation I see when trying to e-mail my work e-mail from my customers test account
Dec 4 21:47:20 2011 Connection Refused - Policy violation TCP 10.10.XX.XX:4632->67.210.XX.XX:110 on ixp0
This is another violation that shows up and I have port forwarding enabled on port 25.
Dec 4 22:50:58 2011Connection Refused - Policy violation TCP 125.163.XX.XX:26566->10.10.XX.XX:25 on ixp1
Thanks,
Lo

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RV042 Hardware V 1.2 Firewall is blocking some incoming mail

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