Postfix and Dovecot still use old certificate

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#1 Thu, 12/20/2018 - 07:25

Postfix and Dovecot still use old certificate

Hello all,

Although my certificate from Let's encrypt is updated: (Expiry date Mar 20 11:51:44 2019 GMT), Last successful renewal: 12/20/2018 2:51 PM,

Print screen from last request

when i try to manage my email on thunderbird or any other mail client I get a certificate warning for incoming and outgoing emails.

Current certificate: "This SSL certificate is already being used by : Webmin (, Usermin (host, Dovecot (host, Postfix". On thunderbird, if I check certificate status for imap it says:

Period of validity Begins on: 26 June 2018 Expires on: 24 September 2018

This is strange because I had no issues for over a year

System information:

Webmin version: 1.900 Virtualmin version: 6.05 Ubuntu Linux: 16.04.3 Apache version: 2.4.18 Dovecot Server Version: 2.2.22 Postfix version: 3.1.0

Any advice or directions where to look are highly appreciated! Thank you.