How to fix “421 Too many concurrent SMTP connections”

Check and increase (add if needed) the smtp_accept_max value from the inside your exim configuration file

cat /etc/exim.conf |grep smtp_accept_max
smtp_accept_max = 100

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One comment on “How to fix “421 Too many concurrent SMTP connections”

  1. Wonderful site. Plenty of useful information here.

    I am sending it to a few buddies ans additionally sharing in delicious.
    And obviously, thanks in your effort!

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