tmp blocking new incomming mail

[Gary Alexander]

2008/6/6 Jan Agermose <ja at conviator.com>:
> hi
>
>
>
> I want to block for new mails with out stopping mailscanner handling mails
> already queued and I dont want to do it by sending a "get back later" error
> since this will not ofload to the 2. MX correct? So I was thinking that I
> could simply block using iptables but Im not sure how to write the rule with
> out stopping Mailscanner completly. But as I understand it the incomming
> sendmail is listening on eht0 and the outgoing is listening on the
> lo-interface? So if I block port 25 on eth0 only then Mailscanner will still
> be able to process all the mails queued already?
>
>
>
> regards
>
> Jan

You can do it with iptables:

iptables -I INPUT -i eth0 -p tcp -m tcp --dport 25 -j REJECT

That's applicable if eth0 is your external interface to the internet...


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