On 1 Feb 2018, at 21:31, Olivier olivier.nic...@cs.ait.ac.th> wrote: > Is that a know problem? Is there a fix?
It is not. I have a postfix 3.2 install and primary use Macs to access it. Works fine one new and old accounts. However, this sounds like a dovecot issue, not a postfix issue. And you didn't provide any logs for the "can't use old accounts" events, so it's hard to say. Or maybe you are using something other than dovecot, in which case use dovecot. Ah, I see reading ahead that you are using cyrus. I found cyrus to be poorly documented and fragile, and switched to dovecot on recommendations on this list. I've been pleased with it. In all likelihood, the settings for authentication need to be updated on the Macs. Generally the Mac does a good job of setting the accounts up correctly, but it will not change the settings when your server changes. Check the port number and the authentication method and make sure they match a working account. <https://www.dropbox.com/s/85xy4tc24i5twqr/Screenshot%202018-02-03%2010.06.26.png?dl=0> (That is for macOS High Sierra v10.13, earlier versions may look different) I suspect either the port is wrong or the Authentication method is wrong, or both are wrong. -- 'You know me,' said Rincewind. 'Just when I'm getting a grip on something Fate comes along and jumps on my fingers.' --Interesting Times
