Re: [exim] 421 Too many concurrent SMTP connections

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Author: Odhiambo Washington
Date:  
To: CIS Exim users mailing list
CC: exim-users
Subject: Re: [exim] 421 Too many concurrent SMTP connections
On Tue, Jan 20, 2009 at 1:47 PM, Proskurin Kirill
<proskurin-kv@???>wrote:

> jori.hamalainen@??? wrote:
> >> Relay under heavy network load - really many what to connect it.
> >> And I start to get
> >> "421 Too many concurrent SMTP connections; please try again later"
> >> in logs.
> >
> >> But I don`t use rate limiting. What else can make this? And how can I
> > change it?
> >
> > On which server and from which direction. Is that on "=>" log-line or is
> > your server denying connections? Because it affect which server you
> need to
> > tweak.
> >
> > More to read, exim documentation 14.10 "resource control".
> >
> http://www.exim.org/exim-html-current/doc/html/spec_html/ch14.html#SECID105
> >
>  > Mostly you should be interested in options:
>  > smtp_accept_max            simultaneous incoming connections
>  > smtp_accept_max_per_host    connections from one host

> >
> Oh, so it have some defaults of rate limiting...
> I thint what if i not set it - it is unlimited.



If it was, you'd be DoSed like hell.


-- 
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223
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