* tejas sarade :
> Hello,
>
> I am trying to interpret two different MX lookup errors.
>
> 1) In first case Postfix generated NDR immediately and error message as
> follows
>
> dsn=5.4.4, status=bounced (Host or domain name not found. Name service
> error for name=aaa-rus.ru type=A: Host found
tejas sarade:
> 2) In the second case Postfix deferred the mail and retry to deliver mail.
>
> dsn=4.4.3, status=deferred (Host or domain name not found. Name
> service error for name=bb-logistic.ru type=MX: Host not found, try
> again)
The DNS server did not reply, or it replied with a "try
