Thank you. I see it maybe me doing the limiting 

smtpd_recipient_limit (default: 1000)

    The maximal number of recipients that the Postfix SMTP server accepts per 
message delivery request.



Q1 = So, can I assume it does not matter if the recipients are in the TO, CC, 
or BCC field, the hard limit is 1000 ?
Q2 = how do I search the logs for messages telling me I exceeded the limit ? 
what is the postconf entry to check if I am logging this stuff in first place ?

Q3 = is there danger in increasing limit so senders emails are delivered as 
they should be ? What other options are there ?

Thank you.


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


-----Original Message-----
From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] 
On Behalf Of Bastian Blank
Sent: Friday, August 4, 2017 11:00 AM
To: postfix-users@postfix.org
Subject: Re: recipient limit question

On Fri, Aug 04, 2017 at 02:29:00PM +0000, Fazzina, Angelo wrote:
> Did my postfix instance limit the number of recipients in the email that was 
> sent ?

Yes, it restricts the amount of recipients to the number given.  Your
client needs to do another mail transaction with the remaining
recipients.  For more information see
https://tools.ietf.org/html/rfc5321#section-4.5.3.1.8

Bastian

-- 
Lots of people drink from the wrong bottle sometimes.
                -- Edith Keeler, "The City on the Edge of Forever",
                   stardate unknown

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