docker-www.rthoni.com/apache/wwwroot/.well-known/autoconfig/mail/config-v1.1.xml

<clientConfig version="1.1">
  <emailProvider id="rthoni.com">
    <domain>rthoni.com</domain>
    <displayName>rthoni.com</displayName>
    <displayShortName>rthoni.com</displayShortName>
    <incomingServer type="imap">
      <hostname>mail1.rthoni.com</hostname>
      <port>993</port>
      <socketType>SSL</socketType>
      <authentication>password-encrypted</authentication>
      <username>%EMAILADDRESS%</username>
    </incomingServer>
    <outgoingServer type="smtp">
      <hostname>mail1.rthoni.com</hostname>
      <port>587</port>
      <socketType>STARTTLS</socketType>
      <authentication>password-encrypted</authentication>
      <username>%EMAILADDRESS%</username>
    </outgoingServer>
  </emailProvider>
</clientConfig>