[exim] Re: smtp_accept_max & DDoS

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Author: Lena--- via Exim-users
Date:  
To: exim-users
Subject: [exim] Re: smtp_accept_max & DDoS
Please create DNS records instead of CNAME:

lists.exim.org. 300 IN MX 10 lists.exim.org.
lists.exim.org. 300 IN A 37.120.190.30

Or accept emails to lists sent to <listname @ cumin.exim.org> .

Else some people trying to post to lists get "unknown user"
because sendmail "canonicalises" hostnames.

> From: Andrew C Aitchison


> If we can reduce
>      smtp_receive_timeout
> in the auth acl and increase it again in the data acl,
> will that stop the process getting stuck ?


smtp_receive_timeout is expanded in smtp_setup_msg function in smtp_in.c
at the start of a SMTP session.

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