Hello. I tried to use /usr/libexec/mail.local as a LMTP capable local mailer in sendmail.mc:
FEATURE(`local_lmtp', `/usr/libexec/mail.local') but found that LMTP was not supported - fragment from syslog: "mail.local: usage: mail.local [-lL] [-f from] user ..." Tell me, please, are there any reasons not to use mail.local from /usr/src/gnu/usr.sbin/sendmail? Or maybe there is another LMTP capable local mailer in OpenBSD... PS. If LMTP is not supported by a local mailer then in some cases the same message can be delivered to some recipients several times. It's possible to turn off delivery to multiple recipients for a local mailer: MODIFY_MAILER_FLAGS(`LOCAL', `-m') but this significantly increases CPU usage when delivering the message to each recipient individually ("Sendmail Performance Tuning" by Nick Christenson).