Sender Domain check with smtpfront-qmail

[Thomas Rabe]

For
qmail-smtpd is a patch available (mfcheck) which checks the sender
domain at smtp-level against DNS and reject if it's non-existant. Is it
possible to get this feature work with smtpfront-qmail?

It is possible, and would be fairly straightforward to write up as a
plugin, but no one has done so yet.

Hi,

just looked into the qmail-mfcheck patch
(http://www.qmail.org/qmail-1.03-mfcheck.3.patch), it's asking the dns
for the mx ip. How should such dns functions implement in a plugin?
Linking against some unix libs (what libs provide such functions), or
copying the relevant qmail-source files?

Btw, an other sender check i'm interested is to validate the From:
address with cvm-vmailmgr if the domain is in my rcpthosts file. I get
spam-messages like this:
From: ***@mydomain
To: ***@mydomain
and want to reject them.


Greetings,

Thomas Rabe.