On 2018-02-22 (10:06 MST), Aki Tuomi <aki.tu...@dovecot.fi> wrote: > > You can use username_filter setting on passdb block since 2.2.30
Excellent! thanks. username_filter = "!*@*" looks like the right syntax to put in the driver=pam block. …yes, that appears to do the job. -- Would you say you worship Satan, or do you simply respect his no-nonsense approach to discipline?