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Question Limit sendmail to send at only one IP or only one domain

bv4nuf

New Pleskian
Server operating system version
Debian 10.13
Plesk version and microupdate number
Plesk Obsidian 18.0.49
Hi all.
I would like configure sendmail to be able to send emails only to one domain, or only one IP.
The aim is to set up quite a "private server", in order not to be able to send email to other domains.
Didn't found anything in Plesk, so thanks in advance for help.
 
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