Exim version x.yz ....
changed uid/gid: forcing real = effective
  uid=uuuu gid=CALLER_GID pid=pppp
configuration file is TESTSUITE/test-config
admin user
changed uid/gid: privilege not needed
  uid=EXIM_UID gid=EXIM_GID pid=pppp
originator: uid=CALLER_UID gid=CALLER_GID login=CALLER name=CALLER_NAME
sender address = CALLER@myhost.test.ex
set_process_info: pppp accepting a local SMTP message from <CALLER@myhost.test.ex>
 in hosts_connection_nolog? no (option unset)
LOG: smtp_connection MAIN
  SMTP connection from CALLER
SMTP>> 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
smtp_setup_msg entered
SMTP<< HELO    ?
LOG: smtp_syntax_error MAIN
  SMTP syntax error in "HELO    ?" U=CALLER NULL character(s) present (shown as '?')
SMTP>> 501 NULL characters are not allowed in SMTP commands
SMTP<< quit
SMTP>> 221 myhost.test.ex closing connection
LOG: smtp_connection MAIN
  SMTP connection from CALLER closed by QUIT
search_tidyup called
>>>>>>>>>>>>>>>> Exim pid=pppp terminating with rc=0 >>>>>>>>>>>>>>>>