I just recently upgraded and I can say after weeks of testing features
and tinkering with configs, successfully.
My biggest advice to accelerate migration process and get past all the
issues quickly, is run doveconf -n and pipe its content to dovecot.conf
new file, take backup of 2.3 config in conf directory and make sure to
move it outside dovecot in another directory, leave only dovecot.conf
empty file and go through dovecot upgrading guidelines with all new
settings tab opened and confirm each setting still exist from old config
and tweak what you should accordingly.
Refer to:-
https://doc.dovecot.org/main/core/summaries/settings.html
On 2025-02-09 20:33, Ken Wright via dovecot wrote:
I've been trying to upgrade to 2.4.0. I've gone through the conf
files, changing variables per the upgrade instructions. When I try to
run sudo systemctl start dovecot.service, I get error 89. Journalctl
shows me the error in question is "File name too long." I think it's
coming from where 10-ssl.conf looks for the certs, but I'm probably
wrong. Can anyone make a suggestion?
Ken
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