Smtpd.conf(5) %a and %u

[percy piper]

Hi all.
Smtpd.conf(5) states that %a expands to the user before alias resolution
and %u after. Is it the other way round? I am probably missing something
but on the latest i386 snap it seems %a and %u do the opposite to what
smtpd.conf(5) claims?
Can anyone clarify?
Many thanks
Percy