MPE/iX Implementation Issues

• LDAP support

• TLS/SSL encrypted e-mail transport

• SASL secure authentication

• Mail filtering

• Optional chroot()-based security features

• Optional nice()-based dispatching priority adjustments

• Sendmail programs that read terminal input by using stdin will echo one character per line and not recognize CR characters or :EOD properly. The workaround is to redirect stdin to either a pipe or a disk file, i.e.,:

  shell/iX> /bin/cat - | makemap hash mymap
  or
  shell/iX> makemap hash mymap <diskfile

• Sendmail's "background" DeliveryMode on MPE/iX is actually a hybrid between "background" and "interactive". A background process will be started to deliver the mail, but if it has not finished by the time the parent process is ready to terminate, the parent process will wait for the background process to finish.

• Symlinks such as /SENDMAIL/CURRENT/bin/mailq that point to the main Sendmail NMPRG must be invoked from the POSIX shell in order to work properly because invoking them from the CI doesn't initialize ARGV[0] with the name of the symlink. If you need to invoke this symlinked functionality from the CI, you will have to specify the Sendmail parameters that invoked the desired functionality, i.e., :XEQ /SENDMAIL/CURRENT/SENDMAIL -bp.

• The newaliases utility will complain that it cannot alter the ownership of /etc/mail/aliases, but this warning can be ignored if you are always logged on as SERVER.SENDMAIL when doing maintenance, i.e.,:

  :HELLO SERVER.SENDMAIL
  :XEQ SH.HPBIN.SYS -L
  shell/iX> newaliases
  no fchown(): cannot change ownership on /etc/mail/aliases
  /etc/mail/aliases: 2 aliases, longest 15 bytes, 48 bytes total