Because it is a PASSWORD hash, not an authentication mechanism.
On 12/6/18, 12:37 PM, "dovecot on behalf of Jerry" <dovecot-bounces at dovecot.org on behalf of jerry at seibercom.net> wrote:
I have the latest port. I discovered that I do not have to list "argon2id" in
"auth_mechanisms", although that does seem strange.
--
Jerry