Milter-greylist

Hi There,

I've just taken over a Sendmail with Greylisting service and although I know about some of it I'm having a few difficulties, hence here I am, and hopefully someone can help.

1) Authowhitelisting - I have the Authowhitelist timeout set to 35 days. In this way most of our genuine business partners will not have to have a delay in sending email. 
What I have been seeing though is that some domains are not being autowhitelisted, even though we are continually seeing emails from them. I can't understand for the life of me why. 

Does anyone have any ideas or know any troubleshooting steps for this?


2) The Order of the Greylist.conf is very important as I have been reading. 

Now near the top of the conf file we have our statements to greylist all incoming email:

acl greylist rcpt /.*@.../
acl greylist rcpt /.*@.../
acl greylist rcpt /.*@.../

At the bottom of the conf file we have a list of whitelisted domains which is as such:

acl whitelist domain External_domain.com
acl whitelist domain External_domain.co.uk
acl whitelist domain External_domain2.com

Now, according to other posts, the above means that everything incoming is going to be greylisted (unless autowhitelisted) as:

From: You@External_domain.com
To: Me@MyDomain1.com

The greylist.conf will be read top to bottom and will never hit the acl whitelist at the bottom of the conf file, as it will read the first entry, 

acl greylist rcpt /.*@.../

Is this correct or am I missing something?


3) I remember ages ago being told that the ACL's needed to be in alphabetical order? I'm not sure if this is correct or not? Any idea?


Thanks

Phil