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LoopingFred
LoopingFred
New Member
November 20, 2017
Solved

Fortimail - 421 4.7.0 Too many concurrent connections

  • November 20, 2017
  • 1 reply
  • 41888 views

Hi All, 

 

Brand new here :)

 

I need a hand to an issue I am having with my Fortimail appliance, where large volume emails (legitimate!) are being refused by Fortimail.

Error: 

Deferred Queue              (host %FORTIMAIL%[%FORTIMAIL IP%] refused to talk to me: 421 4.7.0 Too many concurrent connections.)

This is doing my head in, as I cannot find the option anywhere to increase throttling!

Fortimail: 400E

My Session and SMTP limits are put to the maximum, but the issue still persist. I keep reading the cookbook, but I cannot find where to increase throttling overall, or for a particular SMTP address (That would be FireEye in our case).

Any ideas or pointers?

 

Many thanks, 

 

Fred

    Best answer by Bromont_FTNT

     

    Session Profile: Conection Settings ---> Maximum concurrent connections for each client: 

    1 reply

    abelio
    SuperUser
    abelio
    SuperUser
    November 20, 2017

    Hi Fred,

    smtp connections is a matter related with sessions, look your logs in order to get info about which policy is triggering that message.

    After identified the relevant access list/policy, dig into session profile controlling it.

     

    Bromont_FTNT
    Staff
    Bromont_FTNTAnswer
    Staff
    November 20, 2017

     

    Session Profile: Conection Settings ---> Maximum concurrent connections for each client: 

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