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Change Target port SMTP MTA to internal Exchange

Hello,

I need to change target port to internl exchange server to port 5252. MTA mode uses port 25 as normal.

Cause of reicipent filter with callout needed, this is not working on smtp port 25, cause of exchange implementation.

This have to setup on another port diffrent from port 25.

I have added a NAT rule and Firewall rule, but it is not used.

Sven



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  • Hello,

    How to Nat is known well.

    I like to Nat the smtp MTA proxy sending port 25, when send mails to exchange, from target port 25 to port 5252.

    I have setup a NAT rule, Firewall IPs as source, destination Excachenge, dest port 25, to port 5252, and I have a firewall rule allowing this traffic.

    But it is nor working.

    Sven

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