Sendmail has a switch to turn this on, which is off by default...
Reason being, anyone can point their domain's MX records to your server
and then freely send mail to/through it.
I'm curious to know if qmail starts having performance issues at higher
numbers of rcpthosts. We're currently running about 1800 domains, most of
them in the morercpthosts file.
I personally prefer having more control through these files. Easier to
deny access to someone who leaves or whose server gets compromised.
Jamin
On Wed, 20 Dec 2000, Markus Stumpf wrote:
> Our rcpthosts file ist getting quite big, adding all the domains
> we're doing POP Boxes for and those our customer request backup MX
> for.
>
> Has anyone thought of/patched qmail-smtpd to accept messages based on
> the IP of the MX records?
>
> Are there any pitfalls that I don't think of in the moment that would make
> the mailserver relay open?
>
> \Maex
>
>
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Jamin A. Brown Systems Operations Department
[EMAIL PROTECTED] * Great Works Internet * 207.286.8686 x142
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