ip change from static ip, through behind nat

dear community,

we have changed the public ip-address of our server to a internal (because we have a new setup with 1:1 port forwarding).
since i have done this (has changed the ip-address from static to internal) the postfix server from our webs on same server are not receiving emails from that.

what i have to change that this working correctly? before i have done this change, all working good.

thank you so much

 

Please provide some relevant lines from log files (/var/log/mail.log) and error message

 

In general, public mail and dns server must have static / fixed public ip unless they are only meant for internal usages, so the fact that you are using static / fixed local ip doesn't dismiss that requirement.

Do provide further info as asked by @Th0m above.