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Sun, Mar 12, 2017 10:57 pm

Let's Encrypt certificate expired

A couple of days ago, a user showed me a message she saw on her system about a security certificate issue. When I looked at the message, I realized it was due to the expiration of the Let's Encrypt certificate on the email server used by her system. I logged into that system and queried the server with the openssl command to check the expiration date. I saw it had expired that day, March 10.

# echo "quit" | openssl s_client -connect pop3.moonpoint.com:995 -quiet
depth=2 O = Digital Signature Trust Co., CN = DST Root CA X3
verify return:1
depth=1 C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
verify return:1
depth=0 CN = imap.moonpoint.com
verify error:num=10:certificate has expired
notAfter=Mar 10 19:53:00 2017 GMT
verify return:1
depth=0 CN = imap.moonpoint.com
notAfter=Mar 10 19:53:00 2017 GMT
verify return:1
+OK Dovecot ready.
#

From the root account, I renewed the certificate using the command letsencrypt renew.

[ More Info ]

[/security/encryption/openssl] permanent link

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