Mails not arriving to MessageLabs/Symantec clients

I need a solution

Hello,

Unfortunately we have been experimented a lot of business problem, durint the last couple years, because of your service.

We understand perfectly right that it is a very important contribution to Internet the implementation of security policy to reduce spam and a lot of undesirable e-mails. But the problem is not here. The problem is that it is practically impossivel to found a way to remove our IPs from your blacklisted.

By this reason, we are posting here by the first time with the hope someone of Symantec can contribute to resolve this situation, considering that we are not sending spam or even newsletters to our customers.

We have the followings publics IPs:

69.64.73.138
69.64.73.36
69.64.73.174
69.64.73.169

And we will apreciate a lot that this IPs could be removed from any blacklisted in your server.

Aditionally, our mail server is reporting in queue the following messages:

host cluster4a.eu.messagelabs.com[85.158.139.103] said: 421 Service Temporarily Unavailable (in reply to RCPT TO command)

host cluster1.us.messagelabs.com[216.82.241.243] refused to talk to me: 501 Connection rejected by policy [7.7] 19203, please visit www.messagelabs.com/support for more details about this error message.

host cluster4a.us.messagelabs.com[216.82.251.230] said: 421 Service Temporarily Unavailable (in reply to RCPT TO command)

delivery temporarily suspended: lost connection with cluster4a.eu.messagelabs.com[85.158.139.103] while sending RCPT TO

I will be attentive to any comment.

Kind Regards,

Felipe Betancourt.

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