Upgrade to 2.3.1 has failed

[Alexander Dalloz]

Am 15.12.2018 um 19:43 schrieb Aki Tuomi:
>> I've posted te full output from dovecot -n to https://pastebin.com/F8Ra
>> C4bt

You again broke your setup. From your pastebin:

ssl_cert = /etc/certbot/live/privustech.com/fullchain.pem

That's missing the "<" in front of the path to the certificate file. 
Proably the same mistake for the ssl_key parameter.

Alexander