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View email from email server outside internal network

We have an email server behind our corporate network using a POP3 setup.  The POP and SMTP settings point to the IP address of the email server which are NAT'd from the external IP.  I want to be able to check our email from outside the network....i.e., on the road.  I know that I need to make some DNS entries into our local DNS server and externally as well...but how do you do this specifically?  Thanks so much for your help!
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drummer1960
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drummer1960
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juandelacruz2001Commented:
We need more info from your post. What email server do you have (Exchange, Merak, etc.), how you want to access this mail server (web based, pop3 client email with leave message to the server, etc), and what router firewall you have setup.
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drummer1960Information Security OfficerAuthor Commented:
Kerio Mail Server.  Client is using Outlook with Cisco routers.  I want to be able to setup in the POP3 and SMTP in Outlook using mail.domainame.com.  Hope this helps.  Thanks!
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juandelacruz2001Commented:
Configure your router to forward port 110 to your mail server. Check if your MX records does show mail.domainname.com as pointing to your network. On your field PCs, configure Outlook servers settings to mail.domainname.com and I would recommend to check the "Leave message in the server" so when you go back to your office, your desktop PC can pull a copy of the email you viewed from the field down to your desktop Outlook. One more note, configure your mail server to send outgoing emails only from "authenticated users" so your box will minimized as being used as a spam server.

Hope it helped.
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drummer1960Information Security OfficerAuthor Commented:
How do I setup my MX record to point to mail.domainame.com in my DNS in Active Directory?  Thanks!
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juandelacruz2001Commented:
Is your local network domain hosting your public (DNS) records? If it does not, go to a registrar site (GoDaddy, Netsol, etc.) and  do WHOIS of your domain name and it should show which nameserver(s) is hosting your domain for DNS functions. If you hva control of these nameservers, you can modify the MX records to point to your public IP. I have to warn you, if you're not familiar with editing DNS entries, a mistake will create a big problem to the email traffic to your domain.

If however you don't have control on these nameservers, and email traffic is flowing to your mailserver just fine, I would suggest to leave it as is. You can just set the Outlook mailserver entries to the public IP address assigned to your server (or the router's public IP), but you still have to verify if port 110 is being forwarded to your mail server. This second recommendation I will probably try first.

Hope it helps.
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