Postfix/SSL

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This page is about configuring Postfix to work with SSL.

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Notes

A useful diagnostic command:

• openssl s_client -connect your.server.name.or.address:smtp -starttls smtp
  • "Verify return code: 20 (unable to get local issuer certificate)" does not actually prevent postfix from serving the correct certificate. It seems to have something to do with how the OpenSSL utility is configured.