Milter-greylist

Bob Smith wrote:
> I would like to whitelist email received from a DNS address 
> (foo.dynip.com) which resolves to a dynamic IP address (and possibly a 
> different one the next time you look).
> 
> How do I do this?

AFAIK, there's nothing that currently supports this in milter-greylist. Can you 
use SMTP auth or TLS?


> Also, what is the difference between greylist.conf commands acl, racl, 
> dacl? 

acl is the old syntax, pre 3.1.3 and is the same as racl.

racl is ACLs applied at the time of the SMTP RCPT TO: command (ie: before any 
email is transfered). It is advisable to use these where possible. However, it 
is limited to acting on the sender's IP, reverse DNS, HELO, Mail From: (aka 
return-path) and RCPT TO: contents.

dacl is ACLs applied at the end of the DATA phase of the SMTP session (ie: after 
the email has been transfered). This allows milter-greylist to examine things 
like body text. However, it comes at a penalty of only running after the email 
is transfered, and AFAIK it does not support the greylist action. (greylisting 
at the data phase would likely result in a traffic flood anyway, so you do NOT 
want to do this. Ever.)


> The web page http://linux.die.net/man/5/greylist.conf doesn't 
> mention the latter two commands.

That's because it's the manpage for an older version of milter-greylist that 
didn't support racl/dacl.

>  Where else should I look?

On your system run:

man greylist.conf

That will give you the manpage for YOUR version of milter-greylist, not some 
arbitrary version that die.net is using.