Timo Sirainen <tss@iki.fi> wrote:

On Mon, 2011-04-11 at 18:19 -0700, Joseph Tam wrote:

...

Also, one significant advantage not mentioned for LMTP was that one delivery failure to multiple recipients can be disambiguated; LDA can only return an exit code to be tested by the MTA, but the MTA cannot know which recipient(s) generated the error.

In almost all setups MTA delivers mails to LDA one at a time. Multiple deliveries are useful only if you want to try to get the same mail file hard linked to all recipients. So normally this is a non-issue.

I guess my sendmail is not normal. The default configuration does pool multiple recipient delivery and run mail.local with all these users as arguments in one invocation.

dovecot-lda doesn't seem to support multiple recipients per invocation, so this won't be a problem. The implication for sendmail users, though, is that multiple concurrent deliveries must be disabled if you use dovecot-lda (the 'm' flag must be removed from LOCAL_MAILER_FLAGS) as implicitely done in

http://wiki2.dovecot.org/LDA/Sendmail

I notice the 'A' flag is missing here: doesn't this kill aliasing? If and when I can fully test my setup, I will update this page.

...

  echo "main(int c,char**v){**v='x';sleep(9);}" | \
          gcc -xc -o y -; ./y; rm y &
  ps -f

IIRC /usr/ucb/ps shows the changes.

Ah. I'll take your word for it since I only have the SysV stuff installed. Thanks for the info.

Joseph Tam <jtam.home@gmail.com>