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Test Sendmail TLS Certificate

Created by dave. Last edited by dave, one year and 76 days ago. Viewed 426 times. #1
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(2017-05-04)

Problem

Test Sendmail's TLS configuration.

Solution

$ openssl s_client -starttls smtp -connect localhost:25

This should return a gratuitous barf telling you all about the TLS configuration.

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This is a collection of techical information, much of it learned the hard way. Consider it a lab book or a /info directory. I doubt much of it will be of use to anyone else.

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