On 10/12/2013 10:19 PM, Roman Gelfand wrote: > Looking through the logs, I have noticed an attempt to send out mail > which temporary local fails. I did a dig mx and noticed there is no > mx record. I then tried to connect to the email address domain > portion of the name. Sure enough, I was able to connect. > > Is this legitimate configuration of mail server?
MX records are not required. If there is no MX record, use the domain A record. This is required RFC behavior. > > Is there a way to configure postfix saying that if there is no mx > record attempt to connect to connect using domain portion? Yes, this is the required behavior. This is not configurable. > What is > the exposure? Apparently postfix is working properly. Note that historically, lack of an MX record is not a suitable spam indicator. Spammers easily set up MX records, along with SPF, DKIM, etc. using automated tools. There are better ways to catch spam. There is no "exposure". The presence of lack of an MX record neither adds nor detracts from the reputation of a client. -- Noel Jones
