exchange 2003 and forwarding the mails to google


We are forwarding the mails to some mailboxes to google mail from our exchange server. This way those people have access to their mail out of the office.
We are at the moment using MXLAB anti spam protection. What this does is we receive all our mail from them and send all of our mail to them. They filter the mail for the spam. My boss decided it was too expensive and asked that we change to avast endpoint protection suite.

I have been testing without the endpoint protection suite because I don't find any trial. We got added to blacklist everywhere in 2 hours because we were forwarding the spam to gmail.

So my problem is this : how to prevent this from happening? Also, will avast endpoint protection suite protect our mail before being received by exchange? because if it is not the case I need another way to forward or to filter the spam, because as soon as the mail is on the exchange server it is forwarded to gmail. It would be no use to filter it afterwards, at least for this problem.

It is also acceptable to have another solution to access our mails out of the office, but they need to access it on their phones.
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Andy MIT Systems ManagerCommented:
There's a trial for Avast here:

The endpoint suite doesn't include anti-spam from what I can tell so although it should pick out viruses before Exchange forwards them to gmail, all the spam will still get forwarded which will result in you staying on blacklists.

If staff need access to emails externally then why not use exchange 2003 webmail (OWA) and Activesync for the phones rather than forwarding all email to Gmail?

Note that some newer phones may struggle with Exchange 2003 as it's now quite old (and no longer supported by Microsoft for over a year) so you may want to look at upgrading at some point.

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Scott CSenior EngineerCommented:
What about using OWA with Exchange 2003?  That way users would have access to their email on any device that has a browser.

And you won't have to worry about being blacklisted for any inadvertent forwards.

If you are looking for spam/malware protection, it is included in Exchange 2013.  Exchange 2003 is very old and out of support and a migration would need to be  2-step process as you cannot install Exchange 2013 if 2003 is in place....the install will detect 2003 and simply stop.

You would want to migrate to Exchange 2010 then to 2013.

Another solution would be to migrate to the cloud.  Again, you'd have access to your emails from anywhere.
vanroybelAuthor Commented:
Thanks for the answers. I'll try outlook web access as soon as I have time to learn how to deploy, I have a lot of things to do right now.
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