From the keyboard of Stephane Bortzmeyer :
On Monday 16 September 96, at 18 h 30, the keyboard of "Dan T."
<dragon(_at_)dragon(_dot_)cyberhighway(_dot_)net> wrote:
with no X-Envelope-To header. I've seen in another post and in the
sendmail docs, that if you remove the "F=m" flag from your Mailer, it will
deliver the message once for each recipient, instead of just once for the
local user delivered too.
No, this is not how I understand it. According to the "Sendmail
operations guide" (doc/op.me), "m : This mailer can send to multiple
users on the same host in one transaction. When a $u macro occurs in
the _a_r_g_v part of the mailer definition, that field will be
repeated as necessary for all qualifying users.". So, you can call
programs like uux (for UUCP) only once, saving system resources.
But omitting the "m" flag doesn't prevent sendmail to "suppress
duplicates". This is done long before calling the "local" mailer, in
recipient.c (I checked source code only in sendmail 8.8beta, your mileage
may vary, see function "recipient"). Run sendmail with debug 26.something
and you'll see the duplicates suppressed from the queue.
Eg:
cat testmessage | /usr/lib/sendmail -d11,52.100 an-alias-name
Without F=m,
procmail (local mailer) will be called once for each local recipient.
eg procmail -f sender -Y -a -d user1
procmail -f sender -Y -a -d user2
With F=m,
procmail will be called once for multiple local recipients.
eg procmail -f sender -Y -a -d user1 user2
--
Ann-Kian Yeo Internet: yeoak(_at_)iscs(_dot_)nus(_dot_)sg 772-2780
Dept. of Information Systems and Computer Science (DISCS), NUS, Singapore