I discovered on my SME 9.2 system that none of the old-style pseudonyms had been created -- but I don't use them, so I never knew.
Running this command re-created all of the expected pseudonyms:
/etc/e-smith/events/actions/update-user-pseudonyms
Creating new users in server-manager does create the expected pseudonyms, so this seems to be a backup/restore issue.
I tried creating a new user and received the following error:

However, the new user appears in the list. There are pseudo's created for the new account, but when I try to modify them I get the following in the log file.
generic_template_expand=action|Event|pseudonym-create|Action|generic_template_expand|Start|1512834586 48013|End|1512834586 140295|Elapsed|0.092282
Dec 9 09:49:46 athlon-server esmith::event[8519]: Running event handler: /etc/e-smith/events/pseudonym-create/S55email-assign
Dec 9 09:49:46 athlon-server esmith::event[8519]: qmail-newu: fatal: bad format in users/assign
Dec 9 09:49:46 athlon-server esmith::event[8519]: S55email-assign=action|Event|pseudonym-create|Action|S55email-assign|Start|1512834586 140443|End|1512834586 141305|Elapsed|0.000862|Status|28416
Dec 9 09:49:46 athlon-server esmith::event[8519]: Running event handler: /etc/e-smith/events/actions/adjust-services
Dec 9 09:49:46 athlon-server esmith::event[8519]: adjusting supervised qmail (sighup)
Dec 9 09:49:46 athlon-server esmith::event[8519]: adjusting supervised qmail (up)
Dec 9 09:49:46 athlon-server esmith::event[8519]: adjust-services=action|Event|pseudonym-create|Action|adjust-services|Start|1512834586 141399|End|1512834586 182526|Elapsed|0.041127