[exim] Multiple domains using certificates and keys

Question:

In my configuration file I have

tls_certificate = ${if exists\
                   {/path/to/2021/${tls_sni}/chain.cert}\
          {/path/to/2022/${tls_sni}/chain.cert}\
     {/path/to/default//chain.cert}\
 }
 tls_privatekey = ${if exists\
        {path/to/old/${tls_sni}/key}\
       {/path/to/current/${tls_sni}/key}\
  {/path/to/defalut/key}\
}

Am I missing something?
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