Sendmail (or any reasonable MTA (Mail Transport Agent): postfix, qmail,
etc.) can do this as well, but you have to be careful.
I think what was meant was whether ipchains/Linux can do this, even if it
isn't a mail server; the answer to that is a "no", insofar as I know,
since ipchains is a packet filter, and knows nothing of the mail protocol;
what can be done is write a mod for smtp port, or redirect that port to a
program listening on the firewall/elsewhere that will deal with the email.
(Like transparent squid, except not squid since that's a caching program,
and not an MTA)
Hope that helps!
Brian
> This sounds like a job for procmail!
>
> Ron DuFresne
> > Hi,
> >
> > Can somebody suggest me whether i can block outgoing
> > mail attachements from my internel lan to outside
> > world(like hotmail/yahoo...) by ipchains on linux.
> > system is working as router/proxy/firewall.
> >
> > TIA.
> >
> >
> > Gunjan
> >
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