CES architecture for Inbound Email

[sam cook]

Hi,

We are migrating our architecture from ESA to CES.

We are wondering how to redirect email traffic from the CES cloud platform to our mail servers in our LAN:

Should we redirect to our public IP with a port translation ?

Should we keep our ESA (in our DMZ ) as an email relay machine and keep redirecting Email traffic to the ESA ?

What architecture does Cisco recommend ?

thanks

[dmccabej]

Hello,

With the purchase of CES you'll be assigned an Activations/Onboarding engineer who will be able to help field any questions and assist with the migration from on-prem to Cloud.

Included some additional details below...

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We are wondering how to redirect email traffic from the CES cloud platform to our mail servers in our LAN:

1. Same as mostly any other MTA implementation, you would setup the email to be forwarded to the public IP of the next hop over port 25, in this case your internal Exchange/SMTP/Etc.

Should we redirect to our public IP with a port translation ?

1. Yes, this ties back to the first question. You would setup NAT/PAT to forward to your internal Exchange.

Should we keep our ESA (in our DMZ ) as an email relay machine and keep redirecting Email traffic to the ESA ?

1. Completely up to you and how you want to set it up. It's not necessary, but can be setup in that fashion.

What architecture does Cisco recommend ?

1. Once again, this is up to you and depends on a few variables within your environment. When you work with the CES engineer assisting with the migration they should be able to shed some more light on this topic.

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Thanks!

-Dennis M.

[sam cook]

thanks  dmccabej

[dmccabej]

You're very welcome! I'm glad that I could help.

Thanks!

-Dennis M.