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Security Certs for multiple domains in postfix

sv flag

In postfix when configuring for multiple domains do I need the following lines in /etc/postfix/main.cf for each domain or something else? I already have certs for the domains in question from letsencrypt.

Certificate is saved at: /etc/letsencrypt/live/your_domain/fullchain.pem Key is saved at: /etc/letsencrypt/live/your_domain/privkey.pem

Thank You

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ru flag

You need one SSL certificate with numerous domains added to it.

Otherwise, hostname resolution will fail on TLS and you get a mismatched domain.

I.E. you need to run certbot with numerous -d entries for each domain (i.e. certbot certonly -d domain1.com -d domain2.com -d sub1.domain1.com -d sub2.domain1.com ... with additional -d ... entries for each domain / subdomain you want to match against.)

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