Hi,

Did my postfix instance limit the number of recipients in the email that was 
sent ?


I was reading this  at this link http://www.postfix.org/postconf.5.html

default_extra_recipient_limit (default: 1000)

The default value for the extra per-transport limit imposed on the number of 
in-memory recipients. This extra recipient space is reserved for the cases when 
the Postfix queue manager's scheduler preempts one message with another and 
suddenly needs some extra recipients slots for the chosen message in order to 
avoid performance degradation.

Use 
transport_extra_recipient_limit<http://www.postfix.org/postconf.5.html#transport_extra_recipient_limit>
 to specify a transport-specific override, where transport is the 
master.cf<http://www.postfix.org/master.5.html> name of the message delivery 
transport.

I have an email that was sent to [I don't know how many, still waiting for an 
answer] but logs show it went to 1000, and I see 3 more users that
There is no record the email was sent.  ALL the users were in the BCC field of 
the screen shot if that is important, and FROM and TO are same address.

All I have so far is sender screen shot of outlook email. The account profile 
in Outlook is configured to send to my postfix server directly as seen in logs 
below.

Actual log entries:   $$$$$$=  me removing data

Jul 10 10:39:15 mail5 postfix/smtpd[29198]: D7E6522C: 
client=d115h207.public.uconn.edu[137.99.115.207], sasl_method=LOGIN, 
sasl_username= $$$$$$
Jul 10 10:39:17 mail5 postfix/cleanup[29188]: D7E6522C: warning: header 
Subject: Fall 2017 Important Reminder Emails  from 
d115h207.public.uconn.edu[137.99.115.207]; from=<bur...@uconn.edu> 
to=<derek....@uconn.edu> proto=ESMTP helo=<1GK4LC2>
Jul 10 10:39:17 mail5 postfix/cleanup[29188]: D7E6522C: 
message-id=<042c01d2f98a$4eb3e060$ec1ba120$@uconn.edu>
Jul 10 10:39:17 mail5 postfix/qmgr[1730]: D7E6522C: from=<bur...@uconn.edu>, 
size=10821, nrcpt=1000 (queue active)

    couple samples.....
Jul 10 10:39:50 mail5 postfix/smtp[28794]: D7E6522C: 
to=<michael.sulli...@uconn.edu>, 
relay=d121027b.ess.barracudanetworks.com[64.235.154.140]:25, delay=34, 
delays=1.7/0.07/0.23/32, dsn=2.0.0, status=sent (250 OK 
(matthew.den...@uconn.edu:250 Ok: queued as 
68751F009D,matthew.g...@uconn.edu:250 Ok: queued as 68751F009D,matthew.ger...))
Jul 10 10:39:25 mail5 postfix/smtp[29000]: D7E6522C: 
to=<carson.re...@uconn.edu>, 
relay=d121027b.ess.barracudanetworks.com[64.235.153.2]:25, delay=9.8, 
delays=1.7/0.05/0.33/7.7, dsn=2.0.0, status=sent (250 OK 
(boyd.re...@uconn.edu:250 Ok: queued as 
44ECF2440093,brady.flana...@uconn.edu:250 Ok: queued as 
44ECF2440093,brendan.l...))
Jul 10 10:39:23 mail5 postfix/smtp[28999]: D7E6522C: 
to=<cassie.radzano...@uconn.edu>, 
relay=d121027b.ess.barracudanetworks.com[64.235.150.252]:25, delay=7.8, 
delays=1.7/0.06/0.09/6, dsn=2.0.0, status=sent (250 OK 
(cassidy.o'l...@uconn.edu:250 Ok: queued as 
638D524400C1,cassie.radzano...@uconn.edu:250 Ok: queued as 638D524400C1,ca...))
     ....stops at the 1000th.

Jul 10 10:39:50 mail5 postfix/qmgr[1730]: D7E6522C: removed


Here is some config output of my 2.6.6 install

[root@mail5 home]# postconf |grep -i limit |grep -i recip
default_destination_recipient_limit = 50
default_extra_recipient_limit = 1000
default_recipient_limit = 20000
default_recipient_refill_limit = 100
forward_path = $home/.forward${recipient_delimiter}${extension}, $home/.forward
lmtp_destination_recipient_limit = $default_destination_recipient_limit
local_destination_recipient_limit = 1
qmgr_message_recipient_limit = 20000
recipient_delimiter =
relay_destination_recipient_limit = $default_destination_recipient_limit
smtp_destination_recipient_limit = $default_destination_recipient_limit
smtpd_client_recipient_rate_limit = 0
smtpd_recipient_limit = 1000
smtpd_recipient_overshoot_limit = 1000
virtual_destination_recipient_limit = $default_destination_recipient_limit


-Angelo Fazzina
Operating Systems Programmer / Analyst
University of Connecticut,  UITS, SSG, Server Systems
860-486-9075

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