Just got the message
  smtp; 552 5.3.4 Message size exceeds fixed limit
when attempting to receive a 7MB file:

$ postconf -d | grep size_limit
body_checks_size_limit = 51200
bounce_size_limit = 50000
header_size_limit = 102400
mailbox_size_limit = 51200000
message_size_limit = 10240000

$ postconf -n | grep size_limit
mailbox_size_limit = 0

$ grep mailbox_size_limit *.cf
main.cf:mailbox_size_limit = 0

log:
NOQUEUE: reject: MAIL from mail-pf1-xxxx.google.com[xxx.xxx.xxx.xxx]: 552 5.3.4 Message 
size exceeds fixed limit; from=<u...@domain.com> proto=ESMTP 
helo=<mail-pf1-xxxx.google.com>
Feb  8 17:30:25 my-system postfix/smtpd[28640]: > 
mail-pf1-xxxx.google.com[209.85.210.180]: 552 5.3.4 Message size exceeds fixed 
limit

It appears the:
   actual mailbox_size_limit is unlimited
   actual message_size_limit is 10,240,000
     which is > 7MB

What am I missing, thoughts on how to fix?

Gary

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