[Info-vax] SMTP addresses converted to uppercase :(

[Pierre]

when I send an email using
$ mail NL:/subj="test" "user at host.domain"
the address is is changed to USER at host.domain.

but if I use
$ mail NL: /subj="test" SMTP%"user at host.domain"
the case is preserved

is there a way to have the case preserved w/o having to use SMTP% ?

--------
$ ucx show version

  HP TCP/IP Services for OpenVMS Industry Standard 64 Version V5.6 -
ECO 3
  on an HP BL860c  (1.67GHz/9.0MB) running OpenVMS V8.3-1H1

$ sh log mail$*

(LNM$PROCESS_TABLE)

(LNM$JOB_88DF6140)

(LNM$GROUP_000001)

(LNM$SYSTEM_TABLE)

  "MAIL$PROTOCOL_SMTP" = "TCPIP$SMTP_MAILSHR"
  "MAIL$SYSTEM_FLAGS" = "16"

(LNM$SYSCLUSTER_TABLE)

(DECW$LOGICAL_NAMES)