Re: smtp auth + greylisting

[Chad M Stewart]

Since having users change their settings can be problematic in many  
environments, instead change the MX record.  This way you can  
implement spamd right away and your users will not have to change  
anything.  Though I would suggest moving the users to 587/465 in the  
future so that they don't get burned at places like hotels that  
redirect outbound port 25 traffic to a local SMTP proxy, that won't  
have a clue how to authenticate the user anyways.

-Chad