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Allowed SMTP connections

Discussion in 'E-mail Discussion' started by randee, Sep 11, 2006.

  1. randee

    randee Member

    Dec 16, 2003
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    Black Hills
    /etc/exim.conf (mine) has the following lines:

    smtp_connect_backlog = 450
    smtp_accept_max = 850

    Is there a rule of thumb as to what numbers to use here?
    For example, if you have 4000 email accounts on the server, set it to ???
    (I'm only looking for a rough idea, I realise that would be LOTS of exceptions to any 'rules')

    We have been under a DoS attack and during that time, I had to turn up the accept_max numbers so my clients wouldn't get the error message of "too many concurrant smtp connections"

    Now that the DoS attack is over, I'm trying to fine tune some things. I can do the time-honored 'try it and see', but was hoping someone has some experience with this.

    thanks for any help/suggestions...

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