hi Christian
Did the password hash algorithm change between devuan 3 and 4? You can check that in your /etc/shadow file.
As I understand, devuan is pretty much debian without systemd? And that if you were prepared to do a fair bit of work you could start with debian installed, hack it about and end up with something like devuan?
I doubt devuan has done anything to deviate from debian at this level and both machines were recently dist-upgraded. Dovecot needed no tinkering with at all on the debian machine.
The start of the password field should be the same something like $6$...
Yes it is on devuan 4. I no longer have anything with devuan 3 to check that, but it shouldn't have changed in a dist-upgrade? Interestingly, although it's the same user and password on both machines, I notice that the hashes in /etc/shadow are not identical after the commencing $6$. But then I don't know how these hashes are derived, so maybe that is not unexpected?
-- David Matthews mail@dmatthews.org